ADA.org: DAT Sample Test Items

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1 DE NTAL ADM ISSION TESTING RAM PROG Test It ems Sample Testing De ntal Admission am Progr 211 Eas t Chicago Avenue, Sui te 600 Ch icago, Illinois 60611 1-800-232-2162 ® Association Am eric an Dental ww w.ada.or g These sample test items ar erepr inted for distr ibution in 2007 by the American Dental Associat ion. ©20 07 American Dental Association. Al lrights reserved. You may not reproduce or transmit, by any means or for any purpose, this publication, or any part of it, in print, elect ronic or other for mat without prior express wr itten per mission from the Americ an Dental Associ ati on.

2 MATERIALS DENTAL ADMISSION TEST PREPARATION Howdoes one prepar efor the DAT? Ther eare no shortcuts to the process of learning, and these test prepara tion mat erials ar enot de sig ned to provide the appl icant wi th an opportunity to bypass the extensi ve process of abso rbing basi cinfo rmat ion through class par ticipation and months of study. These test prepara tion mat erials contain samples of the four tests used in the Dental Admi ssion Testing Program. These ar eavailabl eto DAT applicants as ameans of di scoveri ng possible areas of weakness in their com prehension ofsubjects covered by the test. They will also enabl ethe candidates to become fami liar with thetypes of materi al included in the test as well as wi th the gener al coverage and format of thevari ous parts of the test batter y. The ent ireDAT takes 4hour sand 45 minutes (incl uding a15-m inute optional tutori al and break). In the real DAT, the timelimit will be indicated inthe upper right hand cor ner on the computer screen. Therefore, you will need to pace yourself as yo uproceed through each test in the Denta lAdmissi on Test. If you have time remaini ng for asection of the test, you can review your responses. When time expires, the comput er scre en wil lmove to thenext test or optional break period. The structure of the test is given below. Youare encourag ed to revi ew theDAT Tutor ial at www.ada.org/dat.aspx under Step 4before taking the actua lDAT. Th etutor ial pr ovid es some sample items and inform ation on navigating through the test. Den tal Admission Test Co mpone nts of theTest Time Allowa nce Number of Items Optio nal Tutorial 15 minutes Surve yof the Natural Sci ences 10 0 90 minutes Perce ptual Abilit yTest 90 60 minutes Optio nal Break 15 minutes 60 minutes 50-across three reading passages Reading Comp rehensi on Test Quantit ative Re asoni ng Test 45 minutes 40 The Survey of the Natural Science s is atest of achieve ment. Thecon tent is limited tothose areas cover ed by an en tir efirst-year course in biology, general chemi str y, and organic chemistry. The examination iscomprised of 100 items: 40 bio logy items, 30 general chem istry items, and 30 organi cchem istry items. Since se parate sub-scores wi ll be given for each of the three science sections, you shoul dpace yourself throug heach section. Aper iodic table isavail able in the front of the Sample Test Items booklet and wil lbe availa ble as an Exhibit button on the actual DAT. The Perceptua lAbility Test incl ude svar ious types of nonver bal vi sual acuity items. The reare si xsecti ons percepti on, while the other secti ons tothe Perceptua lAbi lity Test. One section cover stwo-dimensional cover three-dime nsio nal per ception. It is impor tant that you read and under stand the instructi ons at the beginning of each section. You must pace yourself so that you com pl ete all six sections of the Perceptual Ability Test wi thin the gi ven time frame. You are not per mitted to use measuring devices (i.e., pencils and fingers) whil etaking the Perceptu al Ability Te st. The Re ading Comprehension Test consists of three readi ng passages, each with 16 to 17 items. The readin gpassages are scie ntific innature and may reflect topics covered in dental school . Candidates are encou raged to read each passag ebefore attempting to answer the corr esponding que stions. On the actual DAT, the Read ingComprehension Test ispresented in asplit-scr een format wi th the items presented on the uppe rhalf of the scre en, whi le the readi ng passage is presen ted in ascrollable format on the lower half of the scre en. One reading passage is provided inthe Sample Test Items. measures your ability to reason with numbers, to mani pulate numerical The Quant itati ve Reasoning Test relatio nships, an ddeal intel lige ntly with quantitative materials. On the actual DAT, abasic calculator will be availa ble as apop-up image for the Quantitative Reasoning Test only. material and is reprinted with permission. in whole or in part. All rights reserved. It may not be reproduced This booklet contains copyrighted

3 S T N E M E L E E H T F O E L B A T C I D O I R E P ©20 00 American Dental Association. All rights reser ved.

4 Thi sexamin ation is comprised of 100 items: Biolog y(1-40), Gen eral Chemistry (41 -70), andOrganic Che mistry (71-100) Organi sms that obtain their ene rgy from 1. An enzym eis added to an aq ue ous 4. light ca nbe termed sol utio nof ATP, DNA, alb umen, fat and glyco gen ;the reaction mixture is incub ate dfor 10 minutes. If an analysis of A. autotrophic. themixture reveals the presence of all of B. holotrophic. theabove compou nds plus gl uco se, it C. ch emo troph ic. can be co ncluded that the enzyme D. heterotrophic. hyd rolyze dsome of the E. heliotrophic. A. alb ume n. Fe rme ntation 2. B. fat. C. glycoge n. A. prod uces pyruvic acid as an end D. ATP. product . E. DNA. B. yi elds less en erg yper mole of glucose than aer obi crespirati on . What cellular organelles would you 5. C. occurs only in the pr esen ce of exp ect to be abse nt from fun gi? oxyg en. D. preve nts glycol ysis from occurring . A. Mito chondria E. co nver ts ethan ol to glucose. B. Lyso somes C. Ribosomes In respiration, oxygen 3. D. Golgi bodies E. Chloroplasts A. co mbines with lactic acid to form pyr uvic acid. Int racellu lar organ elles that participate in 6. B. acts as acofacto rfor glycolytic metab olic oxidations involving H O are 2 2 enzymes . cal led C. yi elds energy in the form of ATP as itis passed do wn therespi ratory A. centriole s. cha in. B. en dop lasmic granules. D. acts as an acceptor for elec trons C. pe roxisomes . (and pro tons), formin gwat er. D. lyso somes. E. co mbines directly wit hcarbon, E. macrobod ies. formi ng CO . 2 material and is reprinted with permission. in whole or in part. All rights reserved. It may not be reproduced This booklet contains copyrighted 1

5 7. Th etwo da ughter cell sforme dby mitosi s The movement of water soluble 11. and cyt okinesis have mo lecu lesthr ou gh cell membranes, from hig her to lower con centrati ons, by atta ch ment to acarrier protein, describes A. half thenumber of chr omo somes present in the pare nt cel l. A. diffu sio ns. B. half thenumber of the B. osmo sis. chr omoso mes prese nt inthe parent C. pin ocytosis. cell if this pare nt cel lis found in the D. active transport. testic ula ror ovaria ntissue . E. facilitated diffusion. C. the same numb er ofchromoso mes present in the pare nt cel l. 12 . As far asthe ir products are con ce rned, D. twice the number of chromosomes all biosynthetic reactions in living cells present in the pare nt cel l. result in E. avariable number of chrom osomes sothat an exact pre dict ioncannot A. amore ordered state, therefore a bemade . de crea se in entr opy. B. amore ordered state, therefore an 8. Starch, ce llulose an dgl ycogen are all increa se in en trop y. C. energy released in the form of ATP. A. proteins. D. energy made available for motion. B. link ed inter nal ly byhydroge n E. amore ordered state with no bonds. en tro py ch ange. C. water soluble. D. polymers of glucose . Wh ich is the sma llest organelle in the 13 . E. nucleic acids. ce ll? 9. Each of the followi ng cel lor gan ell es have A. Golgi body amemb ran ous structure EX CEP Tone. B. Nucleus Which on eis the EXCE PT ION? C. Mito chondrio n D. Ribosome A. Golgi co mplex E. Chloroplast B. Centrio les C. Mi tochondria 14 . For agiven diameter of an axon, one D. Lysosom es fact orwhich increases the velocity ofa E. Endoplasmic reti cu lum nerve impulse is In anaerobic glycol ysis in mu scle ce lls, 10. A. the length of the axon. one mo le of glucose is oxidi zed to B. the ploidy of the nucleus. C. the den sity of mitoch ondria alo ng A. si xmoles of car bon dioxi de. theaxon. B. two mole sof acet ic ai d. D. maximal stimulation of the neuro n. C. two mole sof lactic acid. E. the prese nce of amyelin sheath. D. two mole sof acet yl CoA. E. two mole sof carbon di oxi de and six moles ofwater. This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 2

6 15. Which chiefly stim ula tes act ion ofthe Th eaddition of po tassium iodide as a 19 . resp irato ry center? nu triti onal su pplement to common table sal twoul dmost directly affect the function of which of these glands? A. Carbon dioxid ein the blo od B. Relaxin A. Th yroid C. Lack of oxygen in the blood B. Sweat glands D. Infl ation of the alveolus C. Adre nal co rtex E. Vagus nerve D. Kidneys E. Para thyroid nit u refer sto 16. Th eterm motor Each of the following is synthesized by 20 . A. anentire mu scle. theante rior lobe of the pituitary gland of B. asingle muscle fiber. verte brates EXCEPT one. Which one is C. all the muscl efibers innervate dby theEX CE PTION? one ner ve fiber. D. all the moto rnerve sin one muscle . A. Th yrotropic hormone E. all the sliding filam ent sof act in and B. Adre nocortic otr opic hormone myos in inone muscl efiber. C. Fo llicle-stim ulating hormone D. Growth hormone Th ehuman heart beat is initia ted within 17. E. Oxytoci n the Clotting of hu man blood 21 . A. si nus venosus. B. Hensen’s no de. A. requir es that hemoglobin be C. co nu sarterio sus. pre sen t. node. D. artio-ventricular B. resu lts from fibrin join ing globul in. E. si no-atrial node. C. is aresult of platelets rele asing fib rino gen. In the nephron of the ki dney, filtra tion 18. D. depends on the formation of fibrin occurs between fro mfibrinogen. 2+ is E. is accelerated when Ca A. Bowman’s capsu le and Henle’ s remo ved . loop . B. the glomerulus and Bowm an’s cap sul e. 22 . At some stage of development ,all cho rdates have C. the proximal tubul eand He nle’s loop . A. apharynx, avertebral column, and D. Henle’s loop and the va sa recta. ano tocho rd. E. the peritubular netw ork and the B. pharyngeal po uches, anoto chord, con volu ted tubules. an dadorsal tubular nerve co rd. C. pharyngeal po uches, anoto chord, an dave ntral nerve cord. D. pharyngeal po uches, vertebral colu mn ,and adorsal tubular nerve cord. E. apharynx and an ectodermally de rive d, solid nerv ecord. This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 3

7 23. Organi sms that have the ch aract eristi cs Ass umin gno linkage, how ma ny dif ferent 27 . of radia lsymme try, water vascular kind sof gamete scan be produced by an system, aspiny skin, and ar efou nd organ ism with the genotyp eAaBbcc ? exclusi vely in amar ine hab itat would be in which phylum? A. 32 B. 16 A. Annelida C. 8 B. Chordata D. 6 C. Cnidaria E. 4 D. Porifera E. Echinodermata Wh ich statem ent concerning allel es is 28 . tru efor diploid organisms? Of the follow ing, which group of 24. inverteb rates is appar ent ly most close ly 1. At most only twoalleles occur at a related to primitive ve rtebrates? give nlocus in an organisms ge no me. A. Annelida 2. Alle les occupy an identical locu sin B. Mollusca ho mol ogous chrom osomes. C. Cnidaria 3. Alle les of agiven gene usually D. Art hropoda occur on non-homologous E. Echinodermata chromosomes. 4. Asingle chromosome usually Under the five- king dom classifica tion, 25. carri estwo all eles of each gene. membe rs of the kingdom Monera are gen eral ly separated from the memb ers of A. 4 all the other kingdoms by havi ng B. 1and 2 C. 3 A. heterotrophic nut riti on versus D. 1, 2and 4 auto trophic nutrition. E. 3and 4 B. unicellular organizati on vers us multicell ular organization . In watermelons, the unlinked genes for 29 . C. mi croscopic size versus green co lor (G) and forshort length (S) macr oscopic size. are dom inant over alleles for stripe dcolor D. proka ryotic cells ve rsus eukar yotic (g)an dlong length (s). Predict the cells. pheno types and their ratios for the cross E. parasite-host rel ationship versus Ggss xggSs. predat or-prey relationship. A. All green short Asegment of DNA with the seq ue nce 26. B. 1:2:1 green short: striped long : GG CATTAGG wou ld betranscrib ed into a stri ped short messenger RNA seg me nt wit hthe C. All striped long seque nce D. 1:1:1:1 green short: striped short: gre en lon g: striped long A. CCGUAAUCC . E. 1:1 gree nshort: striped long B. AATGCCGTT. C. CCGTAATCC. . D. AAUGCCGUU E. CCGTUUTGG. This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 4

8 30. Sexu al and asexual reproductio nusuall y Embryo nic inducti on is aprocess in 33 . differ in wh ich A. the ability of the new offspr ingto A. emb ryonic tissues influence reprod uce. ad jacent tissues to differ entiate. B. the rate at whi ch mutations oc cur. B. an unfe rtilize degg is induced to C. the amoun tofgenotypic variation de velop. betw een parent and offspring . C. genes are transferred from one D. the viability ofoffsp rin g. de veloping tissue to another. E. whether or not natur al sel ectio ncan D. resting potentials are induced in occu r. ne ur ons of embryos. E. the maternal pa rent induces expressi on ofrecessive genes in 31. In hum an be ings, colo rbli ndness is embr yos. contr oll ed by an X-l inked recessi ve all ele . In acr oss involving this X-li nked trait, the male pa rent has norm al co lor vi sion, but Which stateme nt is true of the 34 . the female par ent isacarri er. What are arch enter on? the ch ances (in %) that amale offspring will inher it color blin dness? A. Th ecavity of the archenteron is call ed theblasto coele. A. 10 B. Th ecavity of the archenteron B. 25 represe nts the beginning of the C. 50 primiti ve gu t. D. 75 C. Th earch enteron is formed during E. 100 bla stula formation. D. Th ecavity of the archenteron Consid er apair of homologous hu man 32. represe nts the first cavity of the chro mo some s. In this pair one would de veloping heart. expect E. Th earch enteron is formed by a closing of the neural tube. A. them to be genet ical ly ident ical. B. one chromosome to car ry dom inant Of the germ layers comprising the early 35 . alleles an dthe oth er recessive hu man embryo, which one forms most of alleles. thece ntr al nervous system? C. one chromosome to have been inhe rite dfrom the mot her and the A. Ectoderm othe rfrom the fath er. B. Meso derm D. the two ch romosome sto synapse C. Endo derm durin gmitotic pro pha se. D. Notochord E. them to have different sha pes. E. Dermis This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 5

9 40 . Eac hof the following changes the 36. Of the follow ing, the rate and type of fre quency of alleles in apopulation cleavage occurring afte rfer tilization EXC EPT on e. Which one is the would be most affe cte dby the EXC EPTION? A. amou nt an ddi stribu tion of yolk. A. Mut at ion B. numb er of chr omosomes. B. Natural selecti on C. thic kness of thecel lme mbrane. C. Immigratio n D. temperature . D. Rando minterbreeding E. thic kness of thezona pell ucida. E. Genetic drift Th elong-term na tural pr ocess by whi ch a 37. pon deven tua lly becom es aterres trial 41 . A49-gram sample of sulfuric acid, -1 )co ntains  mo l commun ity is referr ed toas SO H (98 g 2 4 A. environme ntal disruptio n. A. 1mol of Sat oms. B. habitat deve lop men t. B. 16.0 gra ms of O. C. orga nic evo lution . C. 2.0 gram sofH. D. ecological succession. D. 2moles of Oatoms. E. dese rtification. E. 1mole of molecules. Th einitial step in the sp eciat ion proce ss 38. are an d1mole of H If 1mole of N 42 . 2 2 often invo lves mixed and allo wed to react according to .What the eq uatio n N +3H 2NH 3 2 2 A. inbreed ing within thespeci es. is themaximum nu mber of moles of NH 3 B. geographical separat ion of tha tcould be produced? popul ati ons. C. intraspecific-ra ndom mati ng. A. 2/3 D. the inheritance of acquire d B. 3/2 cha racte ristics. C. 2/1 E. aHardy-Weinberg equi librium. D. 1/2 E. 1/1 Acomplex behavi oral response to a 39. speci fic cue or release r, whi ch is Aflask weighs 95gwhe nemp ty. When 43 . exhibit ed byall member sof the spec ies fil led wit h200 mL of acertain liquid, the as aste reotyped response tothesame weig ht is328 g. What volume (in stimulus, is kn own as a mil lilite rs) would 1,000 gof the liquid occupy? A. co nd itioned resp onse. B. fixe d-action pattern . C. reflex. D. ki nesis. E. taxis. material and is reprinted with permission. in whole or in part. All rights reserved. It may not be reproduced This booklet contains copyrighted 6

10 44. If 3.00 gof anitrogen-oxygen compoun d 46 . When the volume of agas is decreased is found to con tain 2.22 gof oxygen, wh at at con stan ttemperature, the pressure is the percentage of nitr ogen in the incre ases because the molecules compou nd ? A. move faster. B. move slower. C. become hea vi er. D. become lighter. E. strik eaunit area ofthe container mo re ofte n. Water has ahigher boiling point than 47 . compo unds of asimila rmolecular weight. Which best explains this phenomenon? A. Extensive hydrogen bonding exists be tween water mo lecules. B. One of the natural isotopes of hydrog en, deuterium, is present in suffici ent qua ntities to significantly raise the boili ngpoint. C. Water is apolar co va len t 45. A10.0 liter sample of oxyg en at 10 0° C compou nd. and 1atm is cooled to 27° Cand D. Van der Waals forces exist between expa nde dun til the pressu re is 0.5at m. individ ual water molecules. Find thefinal volu me of the oxygen. E. Water is largely dissociated lead ing to large electrostatic forces be tween individual water mo lecu les. 48 . Asu bstance is non-conducting as asolid an dme lts at750 °C.The me lt conducts electricity. The solid is observed to be sol ub le in wate r. This substance would be be st classified as A. molecular. B. ion ic. C. macr omole cular. D. met allic. E. pol ymeric. material and is reprinted with permission. in whole or in part. All rights reserved. It may not be reproduced This booklet contains copyrighted 7

11 -1 52. If 25 mL of 0.5 MNaOH neu tralizes  mo l ) How ma ny gr ams of NaOH (40 g 49. 35 mL ofamonoprotic acid, which ar ethere in 250 mLof 0.4 MNaOH is the molarity of the acid? solutio n? A. 0.1 B. 0.4 C. 4 D. 10 E. 40 Which will be thefinal volume when 400 50. mL of 0.6 MHCl is dilu ted to 0.5 MHCl? Oconsider ed to In which reaction is H 53 . 2 be acting as an acid? 2+ + A. Zn (s) +2H (g) +H O Zn 2 3 O +H 2 + - +Cl O H B. HCl( g) +H O 3 2 + O C. HC H O +H O H + 2 3 3 2 2 During atitrati on itwas deter mine dthat 51. - C O H 4+ 2 3 2 sol ution was 30.00 mL of a0.100 MCe - + required to react completel ywith 20.00 D. NH +OH O NH +H 4 2 3 2+ mL of a0.150 MFe so lution. Which + + E. NH +H O NH +H O reaction occurred? 4 2 3 3 At con sta nt temperature when the 54 . 3+ 2+ 4+ O 3Fe +H A. Ce +3Fe 2 follo wing reactions involvi ng gases are at - + equilibr ium, which reaction shifts to the +2H +CeO right if the pressure is increased? 4+ 2+ 4+ 3+ B. 2Ce Fe +2Ce +Fe 3+ 2+ 4+ 3+ C. Ce Fe +Fe +Ce 2H A. 2H +O O 2 2 2 2+ 2+ 3+ 4+ D. Ce 2Fe +2Fe +Ce B. 2NH N +3H 3 2 2 4+ 4+ 2+ 2+ +Cs 2Fe +2Fe E. Ce +O C. 2S O 2S O 2 3 2 - +2e +O D. 2NO N 2 2 2CO +O E. 2CO 2 2 material and is reprinted with permission. in whole or in part. All rights reserved. It may not be reproduced This booklet contains copyrighted 8

12 55. Fo rthe equili brium 57 . Determine the heat in kcal/m ol available from the oxidatio nof one mole of glucose 2- + (aq) +SO (aq) Ag (s) 2Ag SO 2 4 (C H O ). 4 6 12 6 )is The solu bility produ ct exp ress ion (K sp H C (g) 6CO (g) + (s) +6O O 12 6 2 2 6 2- + ][SO ] A. 2[Ag 6H O(1 ) 2 4 2- + The heats of formati on are: B. [Ag ][SO ]/[Ag ] SO 2 4 4 o ∆ ∆ H , kcal/mol Substa nce 2- f + ][SO ] C. [Ag 4 (s) -297 O C H 12 6 6 2- 2 + ] [SO ]/[A g SO ] D. 2[Ag 2 4 CO -94 (g) 4 2 O(l ) -68 H 2 2- + 2 ] E. [Ag [SO ] 4 A. -94 - 68 - 297 + 1(-297) B. 6(-94) + 6(-68) 56. Th econcentra tions of silver ion and C. 6(-94) + 6(-68) - 1(-297) chloride ionin anaqu eo us solu tion in D. 1(-297) - 6(-94) - 6(-68) equ ilibrium with sol id silve rchl oride are E. 297 - 94 - 68 -6 M. What is the value ofK 1.0 x10 for sp AgCl equal to? Which process is accompanied 58 . by a de crease in entropy? -6 -6) A. (2.0 x10 )(1.0 x10 A. Sublimatio n of carbon dioxide B. B. Evapo ration of water C. Freezing of water -6 C. 1.0 x10 D. Shuffling a deck of cards -6 E. Heating a ba lloon filled with a gas ) D. 1(1.0 x10 -6 2 ) E. (1.0 x10 If a solution which is 0.50 M in compound 59 . X d ecomposes for 5.0 minutes at an -1 40 M ave rage rate of 0.0 min , the new  con cen tra tion of X will be A. 0.04 M. B. 0.05 M. C. 0.20 M. D. 0.30 M. E. 0.50 M. in whole or in part. material and is reprinted with permission. All rights reserved. It may not be reproduced This booklet contains copyrighted 9

13 60. Fo r the reaction A + B C , th e 63 . In which two compoun ds does nit rogen exper imentally determi ned ra te of have th e same oxidation numb er? for mati on o f C is gi ven by: 2 Rate = k[A][B] . Doub ling the and HN O O A. N 2 3 3 concen tration of B wil l and HN O O B. N 2 5 3 O C. NO and N A. quadruple the initial re action rat e. 2 2 3 B. double the initial re acti on rate. D. N O and HN O 4 2 2 C. have no effect on the initia l ra te. and NH E. HNO 2 3 D. halve the initia l reaction rate. E. redu ce the ra te to one-fo urth its 64 . Wh ich species is l inear? initial value. O A. H 2 61. an eous oxidation - Th e f ollowing is a spont B. H Se reductio n reactio n: 2 C. SO 2 2- - 3+ + O + 3I + 6I O + 14H Cr +7H 2Cr D. ClO 2 2 2 7 2 E. CO 2 Which i s the best re ducin g ag ent? 2- 65 . isotopes of oxygen: The three common A. Cr O 7 2 16 17 18 O, O, h ave O, + A. the same a tomic number and an B. H eq ua l num ber of protons. B. the same ma ss number and an C. I 2 eq ua l num ber of neu tron s. and an C. the same a tomic number D. H O 2 eq ua l num ber of neu tron s. D. the same ma ss number and an - E. I eq ua l num ber of protons. E. the same ma ss number and an eq ua l num ber of electrons. 62. Gi ven the follow ing hal f-cell reaction s: - - Cl (g) + 2e 2Cl (aq) E°= +1.36v 2 - 2+ Cu( s) E°= +0.34 (aq) + 2e v Cu What is the value of E° for the fo llowi ng reactio n? 2+ - Cu (aq) + 2Cl (aq) Cu(s) + Cl (g) 2 A. -2.38v B. -1.70v C. -1.02v D. +1.02v E. +1.70v This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 10

14 - 70 . In the reaction shown below a n itr ogen 66. ion is e for the NO A Lewis structur 3 nu cle us co ntain ing six neutrons emits a second product of po sitron. What is the the bala nce d reaction? 0 13 N e + +1 7 13 A. N 7 Inc ludi ng this structure, th e tota l numbe r ona nce structu res fo r of gr ound state res 14 B. N thi s ion is 7 A. 1. 14 C. C B. 2. 6 C. 3. D. 4. 13 D. C E. 5. 6 13 67. Th e electro nic con figurati on o f a E. O partic ular neu tral ato m is 8 2 2 6 2 2 s 2 1 s 3 s p 3 . What is the num ber of 2 p 2 A ch aracte ris tic feature of the S 71 . unpai red electrons in thi s ato m? N rea ction mecha nism is that A. 1 A. it f ollows first-ord er kinetics. B. 2 B. it p roduces s ter eochemical C. 3 inve rsion of configuration. D. 4 st ep. C. there is no rate-determining E. 0 D. steric factors have little influence on the reaction rate constant. th atomic 68. Which property increases wi E. collision of three or more particles num ber among the representative is re quired. elements of period two? A. At omic radius B. El ectronegativity C. Meta llic ch aract er D. Normal boilin g poi nt E. Melting tempe rature Which pair wou ld gi ve t he bond with th e 69. most io nic character? A. Al and S B. P and O C. B and Br D. C and S E. Li and O This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 11

15 Which alkyl bromi de wil l mo st rea dil y the How doe s the energy content of 74 . 72. n und ergo S 2 re acti on with NaO H? tra nsitio n state of a chemical reactio N co mpare with that of the reactants and produ cts? A. It i s gre ate r than produ cts but less than reac tants. B. It i s gre ate r than reactan ts but less than prod ucts. C. It i s eq ual to both reactants and pro ducts. reactants and D. It i s less than both pro ducts. E. It i s gre ate r than both reactants and pro ducts. 75 . Wh ich intermediate is most likely to be invo lved in the rea ction shown be low ? Cl +HCl CH CHCH CH CH= CH CH CH 2 3 3 3 3 Ethane react s wi th chlori ne in the pre s- 73. ence of hea t or ultravi ol et light to give chloroe thane. he at or Cl +HC l CH CH CH CH +Cl 2 3 3 3 2 UV li ght Which is a n intermedi ate in thi s re actio n? This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 12

16 6. ua l volume s of If partiti oned between eq 8. 7 7 eth er and wa ter, whi ch would show the grea test preference for the wa ter layer? CH CH A. CH CH CH 3 3 2 2 2 CH CH Cl CH CH CH 2 2 B. 3 2 2 C. CH OH CH CH CH CH 3 2 2 2 2 CH CH CH OH CH D. HO CH 2 2 2 2 2 OH OH OH E. HO CH OH CH CH CH CH 2 2 is an importa nt Which structure below 79. resona nce form of 77. A strong infrared ab so rption ban d -1 (5.71 - between 1,7 50 an d 1,7 00 cm μ ) 5. 88 indica tes the pr esence of This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 13

17 82 . Which of the stru ctures below is c hiral? Wh ich confo rmation of 80. 1, 4- dibromocyclohexan e is the most sta ble ? 81. What are the follo wi ng? A. Structur al isome rs B. Enantiomers C. Diastere omers D. Identical compounds E. Meso co mpounds This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 14

18 Whi ch structur e represent s a tran s (E) 83. 85. The reduction of a ketone isomer? A. an aldeh yde fir st, then a prima ry alcoho l. B. a pr imary alco hol. C. a secon dary alcohol. D. a tertiary alcohol. E. a carbo xylic acid. What is the major 86. product of the following reaction? Whi ch is the IU PAC name for this 84. compound? A. 4-me thyl-l-hexene B. 4-ethyl-1-pe nt ene C. 2-ethyl-4-pe nt ene D. sec-b utyl propyl ene E. 3-me thyl-5-hexe ne This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 15

19 Wh ich reactio n is an example of a free 89 . 87. In the reaction , radi ca l chain termination step? the majo r product is 90 . reacti on shown Wh at is the product of the bel ow? CH Th e reactio n of C H 88. Mg Br wit h 2 3 O followe d by hydrol ysis with CC H CH 3 3 dilute aqu eous acid gi ves This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 16

20 s in the Th e two Bronsted-Lowry base 93 . Which could be used in t he follo wing 91. are eq uilibrium below conversi on? HOAc + NaCN HCN + NaOAc A. HoAc + NACN B. HOAc + NaOAc C. NaCN + NaOAc A. LiAlH D. NaCN + HCN 4 E. HOAc + HCN + , H B. CrO 3 C. SOCl 2 94 . of hydrogen in the Th e most acidic type following comp ound is D. PBr 3 + O E. H 3 Which of the al kenes shown belo w reacts 92. with ozone to give the produ cts show n? A. a B. b C. c D. d E. e This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 17

21 Th e conjuga te aci d of p-am ino phe nol 96. The struct ure bel ow is shown with ou t 95. is the co mple te geometrical detail. What co rrect assig nment of bond an gles? A. a = 90 °b = 90 ° B. a = 180 °b = 109.5 ° C. a = 120 °b = 120 ° D. a = 180 °b = 120 ° E. a = 180 °b = 180 ° Wh ich is stabilized by resonan ce? 97 . This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 18

22 98. Which of the fo llowing is aro matic? 99. Treatment of benzoi c acid with thio nyl chl or ide follo wed by addition of ethan ol gives which as the major prod uct? This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 19

23 100 . What is the fina l pr odu ct (B) of the seque nce b elo w? This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 20

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52 utes Re ading Comprehension Test Time limit: 15 min (Actu al Test will contain three passages and RCT - T est Numbe r 5 2 the t ime limit will be 60 minutes ) This distance can vary enormously and IONIZ ING RA DIATI ON: different electro mag ne tic radiations of RISK AND BENEFIT wa ve lengths have differen t properties. At one X ra diat ion is a form of ene rgy w hich wa s very long en d of the sp ectrum there are discovered by the Ger man physi cist, Wilhel m wa ve lengths. Elec tromagnetic radiatio n of Conrad Roentgen i n 189 5. Like vi sib le lig ht, long wa velength is used in the transmis sion of radiowaves, and micr ow aves, X-ra ys bel on g radio mes sages. At the other end o f the to a gro up of rad iat ions kno wn a s the e lect ro- at ions spe ct rum a re th e short wavelength radi magnet ic sp ectrum. E lectro magnet ic such as gamma radiations, wh ich arise from radiation s are com prised of u nit s of pu re na tural ly occurring unstable elements, and X- energy ca lled ph oton s or q uan ta. Unlike rays wh ich are similar in property to gamma corpuscular , or particul ar, radiations which a re radiations, but are man-made by bomb arding composed of sub atomi c parti cles, e lectro - a tar get mate rial with electrons in an X-ray magnet ic r adiati ons have no ma ss or wei gh t. tube . For gamma and x radiations the Su batomic particles t hat can be invol ved in wa ve lengths are s o small that they are tio ns incl ude the alpha corpuscular radia mea su red in Ang strom units, where an pa rticl e or helium rad ical , t he b eta particle or Ang str om un it is 1/100,000,000 centi meter. electr on, neutrons an d pr ot ons. Cor puscu lar highe r the The shorter the wavelength, the radiation s can cause ionizati on; howe ver, fo r trating p ower of the photon, en ergy and pene the pu rposes of the pre sent discussio n o nly an d (as all electromagnetic r ad iations travel at electr omagnetic radi ausing at ions capable of c the sp eed of light) the higher the frequency of dered. ionizati on will be consi diagnostic wa ve s. X-ray wavelengths used in radiology ra nge from app roxima tely 0. 1 to 0.5 All pho tons of elec trom agnetic r ad iatio n tra ve l Ang str oms. At such wave len gths the radiation ion at the spe ed in direct lines in a wave mot ha s sufficient en ergy to cause ionizat ion of of 300 ,000 kilometers per second. Many of atom s and mole cules. If such atoms or our conce ptu al ideas a bout w ave motio n are mole cules are within living systems, there is the resu lt of o ur sensory exp erience with the the pote ntial for b iologica l harm. This is the transverse waves wh ich o ccur in w ate r a nd in reason fo r the pa rado x that X-rays can cause the stre tched str ing of a musical i nstrument . I t to help in diagnosis of can cer, can be used is a pit y in some w ay th at th e same ter m, disea se, and in high doses can be u sed to wave, i s given to b oth th is t ransver se wa ve de str oy can cer cells. form and the oscillat ory movement wh ich is pr opa gat ed alon g the dir ect ion of t ravel by Co ns ideration of the potential benefits of an electr omagnetic radi at ions. Th is oscil latory act ivity i s involve d in the decision of risk movement, or longit udi nal wave propa gat ion , accept ability. In diagnostic radiology, the risk- en a coiled spri ng i s tapped can be seen wh be nefit equation is difficult to estimate. Risk is shar ply at one end , and as su ch this is a go od ge nerally g iven in units of equivalent radiation pa rad igm fo r electrom ag neti c wave motion. d in such do se, while th e benefit is expresse len gth Wher eas for transverse w aves the wave terms a s saved or disease cured . Gibbs and th s, the waveleng is betw een successive crest his fellow workers have noted that estimates ons is the di stance for el ectromagnetic radiati of risk wh ole -body exposure, which is not betwe en successive areas o f compressio n. the diagnostic us e of ge nerally the case for This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 1

53 x radi ati on. Moreo ver, they in dicat ed th at it ha s resu lti ng from the radiation and that which is not ye t been po ssi ble to defi ne the val ue of a rs in spo nt aneous or due to other facto life saved in unit s of d ose equivalence. en vironment. The only way to assess the Because of these u ncertai nt ies, di agnostic be to determine the mag nitude of the risk would rad iati on is to b e regarded as a potent ially or mutat ions in an excess incidence of cancer ami nati on noxious a gent. Hence radiological ex irra dia ted pop ulation. Where the excess f it is l ikely that the shoul d be carried out only i inciden ce is expec ted to be small, ex tremely informat ion obtaine d wi ll be useful for th e periods of large p op ulations and long clinical manageme nt of t he p atient . ob ser vation are required. La nd, for exa mple, sug ge sted th at the risk of breast cancer f rom Un doubt edly ionizing r adi ation in high do se s sm al l when mammo graphy is numerically so can be har mful. The fi rst repor t of patie nt in jury compare d to the spontane ous incidence of one from a diagnostic rad iol ogi cal p roce dure , in 13 fo r bre ast ca ncer in U.S. wo men, t hat the namel y skin burn s, was mad e wi thin a few ep idemiologic methods of evaluation would mont hs of Roentge n’s d iscover of the X-ray. In require a population of at least 60 mil lion tha t case the exposur e time w as one h our, but wo men followe d from age 35 until death . Half e the dose received. it is impossible to estimat mograms and the of them would receive mam the first case of cance r As early as 1902 oth er half, th e control group, would n ot. It goes attribu ted to ra diat ion inj ury was reporte d in the a study woul d take at with out saying, that such literat ure. Nonetheless, the magni tude of the least 40 year s to conduct and would b e so rom the small risk (or even if there is a risk) f pro hibitiv ely expensive that it is not likely to b e doses of x rad iation p resent ly employed for carried ou t. Similar considerati on s ap ply to the diagnost ic purposes i s st ill undeter mine d. eva luat ion of risks from small do ses o f ionizing radiation of all h uman cance rs and mutations. su ch as the recent re Var ious accidents, acto r He nce, i t has been co mmon practice to use inc ident at Cher nobyl in the Soviet Un ion , interpolations from qu antitative estimates and knowl edge ga ined from fo llow- up st udie s on ob ser vation s o f human and animal po pul ations survivor s fr om the atom b om b expl osion s in exp ose d to l ar ge rad iation doses, whe n Hiro shima and Naga saki at t he end of World attemptin g to make numeric estimates of the War II, and experiment s sub ject ing vari ous risks to humans from low doses of ionizi ng plant an d animal s pecie s to i oni zing r adi ation radiation . n be divided indicate th at rad iation bioeffects ca into tw o basic type s w her e r ela tively hig h dose s surrounding p ossible In view o f the uncertainty of r adiat ion are concerne d. On e category of risks from the diagnostic use of X-rays, th e met hreshol d dose can be effects requires a t Interna tio nal Com missio n on Radio log ical before detect able cha nge o ccurs. Such effects Prot ection has originated the concep t of sti c, a nd a re pr ima rily a are termed non-stocha kee ping e xposure levels “as low as rea sonably resul t of cell dea th. Exam pl es are the a cute ach ievable .” This con cept has been d th e development of rad iati on syndrome an summa rize d in cr yptic acronym for m a s th e catara ct s. On the other hand, stochastic effect le. The three key wa ys of ALARA Princip show sta tistical probabi lity of occurren ce a s a min imi zing exposure to radiation are min imizing hreshol d cut o ff for th e fun ction of dose, but no t the durat ion of exposure, maximizing the effect. Examp les o f st ocha sti c ef fects a re arri ers distance from the source, and using b carcin ogenesis a nd geneti c mutati ons. such a s le aded clothing or screens. Dia gnostic X-ray p roductio n occurs only when t he X -ray The proble m in ev al uat ing the risk of ca ncer or tube is e ner gized , and this is only nece ssary mutat ion in human po pul ations due to the wh en rad iographs are being exposed. Th e time diagnost ic use of x rad iati on i s that th ere is n o that th e X-ray tube is energized ca n b e known met hod to disti ngui sh betwe en disea se reduced by using fast image receptors, and by This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 2

54 reducing the number of r adi ogr aph s t aken b y Fro m stateme nts in th e passag e, it c an be 3. inferre d that the author probably high-yi eld selection criteria of the exp osu res to is a (n) be perfo rmed . As the i nte nsit y of th e X-ra y beam is inversely p ropo rtional t o t he square of whose judgments are A. sentimentalist the dista nce from the sou rce (e.g. whe n the his emotions. influ enced primarily by the int ensi ty o f t he bea m is distance is doubled to believe B. skeptic who refuses of f our, whe n tr iple d it is reduced by a factor an yth ing witho ut absolute proof. of n ine ...) the opera tion reduced by a factor C. real ist who adher es to pr actical stan d be hi nd a sho uld be as far as possible to con sid erations and rejects the barrier i mpr egna ble to the X- rays being use d. impra ctical. By conscient ious use of A LA RA P rinciple, th e hi s own D. ide alist who places practit ioners red uce ri sks for themselves, their stan dards of perfection before staff an d thei r pa tients. pra ctical matter s. ideas of E. conform ists who follows the au thority without question. liest descriptor o f ill 1. Wh ich was the ear iati on? effe cts attributed to x rad 4. Wa ve mo tion for x radiation most closely A. Cancer in atom bom b su rvivors rese mble s the oscillating movement of a B. Genetic mutat ion s f ol lowing A. fast-moving helium radical. mammograp hy B. coiled spring that has be en sharply C. Radia tion burns d ue t o pr olonged . tapped at one end exposur e C. plu cked stretched string of a musical D. Acu te radiation syn dr ome after the instrument. Che rnobyl in cide nt D. Wa ve in water caused by E. Cata racts dis turbance from a fast moving motor bo at. 2. Of t he following , w hi ch is t he ele ctro - E. tra nsver se wave form. mag neti c radiati on having the longest waveleng th? 5. Th e par ad ox of x radiation is sta ted to A. Gam ma radiati on be that B. Alph a radiatio n A. it is u se d for diagnostic purposes C. Beta radiatio n wh en the risks involved have not D. X r adiation be en ful ly determine d. E. Radio wave radiat ion B. it w as d iscovered, but not invented, as gamma radiatio n is naturally occurr ing counterpart. C. it can be controlled by mankind. D. it can both cause and cure cancer. E. None of the above This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 3

55 6. Wh ich electro magneti c rad iatio ns carries 9. According to the inverse square la w, the is t herefore most the m ost energy, and inten sity of radiation received is reduced _ __ time s w hen a practition er pe netrat ing? by a factor of sta nd s 4 m eters away from a source of A. Mi crowaves radiation rather th an 1 meter. B. Ra diowaves A. 4 C. Vi sible light B. 0.2 5 D. Ga mma ra ys C. 16 E. The y a ll have the sa me energy. D. 0.0 6 E. 2 Wi th which stat ement wou ld the au tho r of 7. the pa ssa ge agree? The probab ility of genetic mut ation being 10 . A. Ri gorous experi mentation must b e ca us ed by low levels of x or gamma car ried ou t to more accur ately asses radiation is b elieve d to be damage caused b y the di agnostic A. stochastic in nature. use of X-ra ys. B. greate r tha n the risk of cancer. B. Epidemiologic data from indi vidua ls C. thr esho ld do se related. receiving high do ses of r adi ation can D. unrela ted to dose. accura tely be interpolated to assess E. a re sult of cell death. the effects of lo w l evels of r adiatio n. C. No n-stochastic effect s of ra diati on pro ble m f or ar e a more serious The principal difficulty en co unte red when 11. diagno stic radiology than are evalua ting the risk of cancer developing stoch asti c effect s. ostic radiology is du e to the use of diagn D. The most effecti ve wa y to i mprove the risk-bene fit rati o is t o m inimize A. ina bility to distin guish between the numb er of exposur es performed dis ea se ca used by rad iation and that by u si ng carefu l rad iog rap hs du e to other factors. sel ecti on. B. the re latively long life span of E. It is e asy to differe nti at e between hu mans. dise ase c aused by e xposu re to C. the size of th e popu lation one needs ionizi ng radiatio n an d that from other to follow. cau se s. a good D. the difficulty in obtaining con trol grou p. E. the financial outlay necessary f or the Th e beta particl e i s the same as a(n) 8. stu dy . A. neu tron. B. pho ton of pure energy. C. pro ton. D. hel ium rad ica l. E. el ectron. This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 4

56 Of the following 12. , w hi ch accordin g to th e 15 . Wh ich electroma gnetic radiations travels sing tex t are d efinitely capable of cau at the grea test velocity? ionizat ion? A. X-rays B. Visi ble light 1. Visi ble light C. Radiowaves 2. Gam ma radiati on D. Microwaves 3. Micr owa ves E. None of these 4. Radio wave radiat ion Wh ich stateme nt is true for ionizin g 16 . A. All of the above radiation? B. 2, 3 and 4 on ly C. 2 only A. Cer tain cancers have bee n attributed D. 3 only to radia tion injur y. E. 4 only B. Radiatio n burns a re a frequent complicatio n of the diagnostic use of x radi ation. 13. Fo r diagnostic radi ology, which statemen t C. All l eve ls of ionizing radiation are is false? kno wn to be dan gerou s to living A. Pote ntially noxi ou s radi ations are systems. emp loyed. the ALARA D. Practitione rs adhering to B. Thi s use of X -rays wa s fi rst Principle are unde r no risk from the devel oped very short ly a fter use of ionizing radiation. Roe ntgen ’s dis co very . E. More tha n one o f the above. tions ar e no t C. Particulate radia emp loyed. 17 . Th e par ad igm referred to in paragraph 2 is D. Attempts ha ve bee n m ade to develop a(n ) high yiel d se lection cri ter ia. E. Such use of X-rays is excluded from A. precise d escription for the wave the AL ARA Principl e as doses are ele ctro - motion of radiations in the neg ligi ble. mag netic spectrum. B. conceptu al model helping to explain a prin cipal character istic o f electro - 14. Gi bbs and his co -workers consid ered the mag netic radiations. risk-b enefit ratio for the di agnostic use of C. explan ation for long itudinal wa ve ionizin g r adiation d spring. motion in the coile A. should be estim ated as being the movement of D. representation of equ ivale nt to that for whole body ph ysica l matter in the electro - exposur e to the sam e ra dia tion level . mag netic spectrum. B. is complicated by unce rtai nties i n the E. More tha n one o f the above defini tio n of the va lue of a li fe saved in units o f do se equival ence. C. can readily be determ ine d by exami nin g th e excess i ncid ence of adiated cancer a n mu tations in an irr pop ulat ion. D. alw ays sho ws a line ar relationship s between risk a nd the radiation dose. E. More than on e of the abo ve This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 5

57 Time limit: 45 min utes son ing Tes t Quantitative Rea (An electroni c calculator will be available for QR T – Test Nu mber 51 est center) the QRT s ection of the DAT at the t -3 7 on 5 x 1 0 . 1. x 3 x 10 Evaluate the expressi 4. Wh ich is the smallest? -10 A. 11 /15 A. 1.5 x 10 B. 4/ 5 -4 B. 1.5 x 10 C. 21 /25 4 C. 1.5 x 10 D. 5/ 6 5 D. 1.5 x 10 E. 13 /17 10 E. 1.5 x 10 5. f men At a certain convention the ratio o re 352 to women wa s 3 to 8. If there we s 20 . W hich The perimeter of a square i 2. pe op le t here, how many were men? represen ts the area? A. 32 A. 5 B. 96 B. 10 C. 13 2 C. 20 D. 22 0 D. 25 E. 25 6 E. 100 6. If x = and z = , then which is What is the approxi 3. ma te val ue of eq ua l to z? A. 1/ 5 B. 4/ 5 C. 5/ 4 A. 1.6 D. 5/ 2 B. 0.16 C. 0.016 E. 5 D. 0.0016 E. 0.0001 6 This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 1

58 Wh ich is the valu e of 7. 11. If [b (c + d) + e]a = 135, then whi ch varia ble can not b e zero? A. 0.003 A. a B. 0.0003 B. b C. 0.00003 C. c D. 0.00000 3 D. d E. 0.00000 03 E. e 8. Wh ich is th e equa tion of the line th at 12 . con tains the p oin t (3, -1) and is A. 1.0 pe rpendicular to the line y = 3x + 3? B. 15 A. y = 3x - 8 C. 33. 3 B. y = 3x - 10 D. 100 C. y = (-1/3)x + 2 E. 340 D. y = (-1/3)x - 2 E. y = (-1/3)x e, 4 9. A rectangu lar room i s 3 meters wid far is meters lo ng and 2 m eters high. How it fro m t he northeast co rner at the floor t o 10 i s to 2y as 25x is to 13 . the s outhwe st corner at th e ceil ing? A. 5x. A. meters B. 5xy. C. 5x/y. B. mete rs D. x/5y. E. 5y/x. C. mete rs orange juice and 1 liter of 14 . If 3 liters of 40% D. 9 meters 50 % orange juice are mixed , which is the pe rcentage of orange juice in the mixture? E. 5 meters A. 90 B. 85 10. A person trav el s to w ork at an a vera ge C. 47. 5 spee d of 40 mph , and r et ur ns home a t 6 0 D. 45 he a vera ge sp eed mph . What, in mph, is t for the en tire trip? E. 42. 5 A. 45 B. 46 the n which mu st b e If 2x - 3 > 3x + 7, 15 . C. 48 true? D. 52 A. x > E. 54 B. x > -4 C. x > -10 D. x < -4 E. x < -10 This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 2

59 16. Wh ich r epres ent s 5% of 2% of 0.4? 2 - 2z, then f(-1) equals If f(z) = 3z 20 . A. 4 A. 1. B. 0. 04 B. 4. C. 0. 004 C. 5. D. 0. 000 4 D. 7. E. 0. 000 04 E. 11. 17. One pump can fi ll a vat in 1 0 min ute s. tes to walk 3 /8 of a mile. 21 . Mary took 9 minu th e vat in 1 5 Anoth er pump can fill At th is rate, how many minutes will it take minutes. How many m inutes does it take to wal k the rest of the mile? to fill the vat if bo th pump s are ope rati ng at the sam e time? A. 11 B. 12 A. 1/ 6 C. 15 B. 6 D. 18 C. 12 E. 24 D. 12. 5 E. 25 on a two -dimensional 22 . What is the distance grap h be tween ( 7, 6) and (2, -6)? If 1 inch equ al s 2. 5 centim eters , then 25 18. ny in che s? meters equal how ma A. 5 B. 9 A. 0. 01 C. 13 B. 0. 1 D. 17 C. 10 E. D. 62. 5 E. 1, 000 with rig ht ang le at In a right triangle ABC 23 . C and A B = 6, BC = 3, find AC. 19. In a given course a stu dent re ce ives pr elimi nary examinati on gr ades of 81, 85 , A. 3 an d 95. The final examination is weighe d B. 6 age of th e for one-t hird and the aver C. 27 ei ghed as 2/3 of pr elimi nary grades is w D. 33 the fin al grade . What should th e final E. 3 exami natio n grade be f or a sem ester aver age of 90? 24 . When each of the sides o f a squ are is A. 99 increased by 1 ya rd, the area of th e new B. 96 sq ua re is 53 squ are yard s more th an that C. 93 of th e o rigin al square. What is the length D. 88 of th e si de s o f the original squa re? E. 87 A. 25 B. 26 C. 27 D. 52 E. 54 This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 3

60 25. A mother’s age is t hre e tim es he r the length of the Wh ich of the following is 28 . da ughte r’s age. In twel ve year s th e line seg men t BC, if AB = 14, AD = 5, and er ’s mother’s age will be twice the daught an gle BAD = 30°? ld is the mother ag e at th at time. How o no w? A. 18 B. 20 C. 24 D. 30 E. 36 26. Fi nd the a verage of the fol low ing li st of three we ights: 3 lb. 2oz., 4 lb. 6 o z., an d 9 lb. 10 oz. A. 7 B. 9 A. 5 lb . 6 oz. C. 7 B. 5 lb . 6 1/3 oz. D. C. 5 lb . 1 1 1/3 oz. E. D. 5 lb . 3 9 1/3 oz. E. 8 lb . 9 oz. 5 feet 29 . A painting which is 4 feet wide and long is surrou nded by a rectangular frame 27. If x = 5, the n x + 4 is what per ce nt of 2 6-inc hes wide. What percent of the area of + 2? x the pict ure and the frame is occupied by the frame? A. 19 B. 33 1/3 A. 10 1 /2 C. 75 B. 20 D. 300 C. 30 E. 540 D. 33 1 /3 E. 50 30 . A bowl contains 7 green and 3 re d marbles. What is the probability that two marbles se lected at r andom from this bowl wi tho ut re pla cement are both red? A. 1/1 5 B. 9/1 00 C. 21/ 100 D. 47/ 90 E. 3/5 This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 4

61 Each of th e circles I, II, and III is ta ngent 36 . 31. If 1 meter = 3. 28 fee t, 4/5 of a foot is The areas of the to th e o ther two circles. actio n of a met er? ap proximately what fr π , 9 π , and 16 , resp ectively. circles are 4 π A. 1/ 5 Which represents the le ngth of the B. 1/ 4 pe rime ter of the triangle form ed by joining the cent ers of th ree circles? C. 1/ 3 D. 1/ 2 E. 3/ 4 If y = , the n wh ich of t he fo llowing 32. ? represents x A. (3y + 2)/(y - 1) B. (3y + 2)/(y) C. (3y - 2)/(y + 1) D. (5y)/ (y + 1) A. 3.0 E. (3y - 2)/(y - 1 ) B. 9.0 C. 14. 5 D. 18. 0 is equal to Fo r all y , the cos y 33. E. 29. 0 y A. sin π ) y B. cos ( + The number s (1, 2, 3, 6) have an average 37 . C. sin (- ) y (arith metic mea n) of 3 and a variance of D. sin + cos y y 3.5. Wha t is the avera ge (arithmetic E. cos (- ) y of the set of n umbers me an ) and variance (3, 6, 9, 1 8)? /3) eq uals t he 34. Th e value of cos ( π A. 9, 31.5 value of B. 3, 10.5 C. 3, 31.5 A. -cos (2 π /3). D. 6, 7.5 π B. cos (2 /3). E. 9, 27.5 C. cos (6 /3). π π /3). D. -cos (5 /3). π E. cos (4 She wi ll s ele ct 38 . Jill has six different books. on e book on Monday and a different one to read on We dnesday. In how many ways Wh at is the maxim um num ber of 3-in ch 35. ca n Ji ll select two different books? squa res (sq uares t hat ar e three inches on a side) that ca n be cut from a sheet of tin A. 36 19 x 23 inches? B. 30 C. 18 A. 42 D. 15 B. 48 E. 12 C. 49 D. 145 E. 146 This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 5

62 A vehicl e covers 1 00 yard s in 12 .5 39. second s. Find the ave rag e sp eed of th e . vehicle i n feet per second A. 2 2/ 3 B. 4 C. 8 D. 12 E. 24 40. A. B. 1/2 C. 1/5 8 D. 2 E. 58 This booklet contains copyrighted material and is reprinted with permission. All rights reserved. It may not be reproduced in whole or in part. 6

63 Dental Admi ssi on Preparation Material Answer Keys ON READING COMPREHENSI SU RVE YOF TH ENATUR AL SCIENCES C 1. 1. 26. A 51. C 76. A A 2. E B 2. 27. E 52. A 77. B 3. C B 78. D 53. E 28. D 3. B 4. 54. C 4. 29. A D 79. B 5. D B 80. E C 30. E 5. 55. D 6. 6. 81. E 56. C 31. C C 7. D 82. C 57. C 32. C 7. B 8. E E 83. C 58. A 33. D 8. C 9. D 59. 34. B 84. A 9. B 10. A 10. 85. C A 60. A 35. C 11. A B 86. 61. E 11. E 36. A C 12. 37. C 12. A 87. D 62. C 13. E B 38. C 88. B 63. 13. D B 14. 39. E 14. E 89. B 64. C E 15. 40. 15. A D 65. A 90. C A 16. 16. C 41. D 66. C 91. B 17. B E 42. A 67. B 92. B 17. B 18. 68. B 93. C 43. B 44. D E 94. A 19. A 69. D D 95. C 45. 70. 20. E E 71. B 96. 21. D 46. D 47. A 72. D 97. E B 22. 48. B 73. A 98. E 23. E 49. E 74. E 99. B 24. C 50. A 100. C 25. 75. D C PERCEPTUAL ABI LITY TEST TE ST EREASONING QUANTATATIV 1. C 41. A 81. 2 C B 1. 61. B 15. E 29. 1 . D D 2 A 2. D 42. B 62. C 82. B 2. D 16. D 30. A 2 . B 3. C 2 3. D 43. C 63. C 83. 31. B 3 . B 17. B 4. D 84. D 64. B 44. A 4. 2 A 18. 4 . A E 32. A 45. 65. B C A C B 5. 5. 2 85. 5 33. B . E 19. B 2 C 46. A 66. 6. 86. D D 6. B 34. A 6 . E 20. C 47. 2 E 67. C 87. C 7. A D 7. B 7 . 21. C 35. A 48. 8. 2 B 8. D A 88. C 68. C D 8 22. C 36. D . 89. E 69. B 49. B 9. 2 C 9. A A 37. E 23. A . 9 90. 70. D A 3 0. 10. B 50. D B B C 0. 1 24. 38. B 11. D 71. A 51. D 1. 3 E A 25. E 39. E 1 1. 3 72. B 52. C 2. E 12. E C C 26. E 2. 1 40. 13. B 3 3. C 53. A 73. D B 27. B 1 3. 14. B 3 4. C 54. B 74. C E 4. 28. 1 A 15. E 5. A 55. A 75. D 3 B 6. C 56. B 76. B 16. 3 D 3 7. B 17. A 77. C 57. 18. C 3 8. B 58. E 78. A 19. A 3 9. C 59. E 79. D 20. 4 0. C 60. D 80. C A This booklet contains copyrighted material and is part. with permission. All rights reserved. It may not be reproduced in whole or in reprinted

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