EXAM 4 Fall 2010 FORM A Biology Sol for Ques 5 , 21 & 25

27 Jun EXAM 4 Fall 2010 FORM A Biology Sol for Ques 5 , 21 & 25

Question
EXAM4Fall 2010 FORMA

1. Which formof theexam do you have?

A. FormA

B. FormB

2. TheHIVvirusthat causes AIDSspecificallyattacksand killshelper T cells. Thisweakens theimmunesystem becausehelper Tcells:

A. directlydestroycellsinfected withHIV

B. roam thebodylookingfor”invaders”

C. turn on (activates) theantibody mediated and thecell-mediated defensesystemsin the

body.

D. produceantibodies

E. turn off theimmuneresponse

3. ChoosetheINCORRECT statement.

A. Theantibody-mediated immuneresponse isdirected atantigensthat are outsideofcells, freein body fluids.

B. Thecell-mediatedimmuneresponseplaysarolein therejection of organ transplants

C. Amacrophagepresents theantigen to theappropriatehelperTcell.

D. Antibodiesareeffective against virusesthat haveinserted their geneticmaterial intothehost cell chromosome.

E. Suppressor Tcellsshut down the immuneresponseafter the“invader”(antigen) hasbeen eliminatedfromthebody.

4. Which partof aviruscomesfromaprevious host cell?The:

A. geneticinformation

B. theprotein coat (capsid)

C. theenvelope

D. noneof theabove

5. Indicatethechoicethat containsonlyCORRECT statements.

Statements:
1. Antibodiesarespecific to oneparticularantigen.

2. Antibodiesareheld within thecell thatproducesthem.

3. Antibodiesmayinactivate(neutralize) atoxin produced byabacterium.

4. Antibodiesareproduced bymacrophages.

5. Antibodiescan onlybeeffectiveagainst antigensthatarefreeinthebloodstream(notwithin cells).

Choices:
A. 1, 2, 3

B. 2, 3, 4

C. 3, 4,5

D. 1, 3, 5

E. 1, 3, 4

6. Theimmunesystem helpsprotect usagainst cancer because attack and killcancerouscellsthat develop.

A. helper Tcells

B. Bcells

C. cytotoxic Tcells

D. all of theabove

7. Howdovirusesgain entryto ahost cell?

A. bybinding to areceptor siteon thehostcell

B. bybinding to an antibodysiteon thehostcells

C. bydissolvingapieceof thehost cellmembrane

D. allof the above

8. ChoosetheINCORRECT STATEMENTabout cervical cancer:

A. Thehuman papillomavirus(HPV) isthought to bean important causeofcervical

cancer

B. Awoman’srisk of gettingcervical cancer generally increaseswith the number of

(male) sexual partnersshehashad.

C. Awoman’srisk of gettingcervical cancer islowered if sheand her partner(s)consistentlyuseabarrier meansof contraception, such as acondom or diaphragm.

D. It can increaseawoman’s risk of having an ectopicpregnancy.

E. It can be detected withaPap test.

9. Your brother confidesinyou that hehaspainful, fluid-filled blister-likesoresonhispenis.Which of thefollowingismost likelyto bethecause?

A. syphilis

B. gonorrhea

C. chlamydia

D. genital warts

E. genital herpes

10. Jennifer isa 28 year-old woman whoishaving difficultygetting pregnant. Aftermanytestsit isdetermined that thereason for thisproblem isthat she hasscartissueblockingher oviducts(fallopian tubes). TheSTDthat is most likelyto havecaused this is.

A. syphilis

B. gonorrhea

C. chlamydia

D. genital herpes

E. genital warts

11.Which of thefollowing directlyactivatesboth the cell-mediated immuneresponseand the antibody-mediated immuneresponse?

A. memoryBcells

B. helper Tcells

C. plasmacells

D. cytotoxic Tcells

E. suppressor Tcells

12. An antigen isa:

A. cell that producesantibodies

B. receptor on thesurfaceof alymphocytethat recognizesinvaders

C. memorycell thatcausesaquick responseto an invader when it isencounteredasecond time

D. alargemoleculeonthesurfaceof an invader that triggersan immuneresponse

E. noneof the above

13. Your friend Joehasbeen dating Claudiaand theyhavebeen sexuallyactivefor threemonths.Joehad never been sexuallyactivebeforehemet Claudia. Joeconfides in you that hehasnoticed awartformingon his penis. Hehasasked Claudiawhether shehasgenital warts. She said, “No.I’vedefinitelynever seen anythingremotelyresemblingawarton mybody.”Heasksyouwheretheycould havecomefrom. You correctlyrespond.

A. You probablygot wartsfromusingthedirtyurinal in themen’sroomof thegasstationwhereyou work.

B. Theorganism that causeswartsisso common that you could havegotten it anywhere.

C. Claudiaisobviously lying. Shewouldhaveseen awart.

D. Inwomen wartsoften formwithin the vaginaor on thecervix, and so Claudiamaynotrealizethat she hasgenital warts.

E. noneof the above

14. Howdoesthevirusmakenewgeneticinformation and proteins?

A. It combineswith thehostcell DNA.

B. It never doesreproduce; it onlygrowslarger.

C. It usesthehost cellstructures.

D. Onceinsidethehost cell it isableto reproducesexually.

15. Your immunesystem doesnot usuallyattack cellsbelonginginyour body because:

A. suppressor Tcellsprevent theattack

B. theantigensonyour body cellsblock theattack

C. antibodies paralyzehelper Tcells

D. memorycellsidentifyand protect bodycells

E. your own body cellshavemolecules ontheir surfaces that identifythem asbelongingin thebody

16. In which choiceareall the STDsusuallycurablewith anantibiotic?

A. herpes, chlamydia, gonorrhea

B. chlamydia, syphilis,genital warts

C. chlamydia, herpes, syphilis

D. genital warts, gonorrhea, syphilis

E. chlamydia, gonorrhea, syphilis

17. Belowyou will find aseriesof steps in thetriggeringof theimmuneresponse. Indicatethechoicethat placesthestepsin theCORRECT order.

Steps:
a. avirgin (cytotoxic) Tcell isactivated

b. amacrophageencountersan “invader”(somethingthat is not recognized asbelongingin thebody)

c. ahelper Tcell isactivated

d. asuppressor Tcell becomes active

e. acytotoxicTcell destroys theinvadingcell

Choices:
A. a, b, c, d, e

B. b, c, a, e, d

C. d, b,a, c,e

D. b, a, c, d, e

E. c, a, c,e, d

18. ChoosetheINCORRECTstatement:

A. If thebacteriathat causechlamydiaaretransferred totheeyes, it can causeblindness.

B. Gonorrhea, chlamydia, and syphiliscan becured withantibiotics.

C. Most women with chlamydiahaveno symptoms.

D. Aman with gonorrheamust ejaculatein order to spread theinfectiousorganism to apartner.

E. HPV, which causesgenital warts, can spread over theentire anal genital area.

19. Which of thefollowingSTDsisINCORRECTLYpaired with ameansof diagnosisthat can beused at somepoint in theprogressionof the disease?

A. syphilis –blood test

B. gonorrhea –blood test

C. chlamydia –urinetest

D. chlamydia — smear of cellsfrominfected area

E. herpes–blood test

20. Your cousin Masoud needsakidneytransplant. Thedoctorsexplain that if thetissuetypeof

thedonor kidneydoesn’tmatch Masoud’stissuetype, that the

of the

immunesystem would attackand kill thedonor kidney, causingtheorgan to berejected.

A. Bcells

B. plasmacells

C. antibodies

D. effectorcytotoxicTcells

E. helperTcells

21. Therefore, to reducethepossibilityoforgan rejection, thedoctorstestall of Masoud’scloserelativesto seewhether theywould besuitable donors. Thedoctorsarelooking for arelative:

A. whosetissueshavesimilar “self”markers(MHC markers) to thoseon Masoud’scells.

B. who lacksantibodiesto Masoud’s tissues

C. who has suppressor Tcellsthat will suppresstheimmuneresponseagainst the donor

kidney

D. lacksmacrophages

E. all oftheabove

22. ChoosetheINCORRECTstatement:

A. Genital wartscan takemonthsto appear.

B. Thesamevirusthat causescold sorescan betransmitted tothegenital areaof anotherperson through oral sex.

C. Herpescan only bespread when therearesymptoms..

23. Damagetonervetissuesuch astheopticnerveand brain occur duringwhich stageofsyphilis?

A. first

B. second

C. third

D. it never occursin syphilis

24. ChoosetheINCORRECTstatement.

A. Avirusinfectsonlyaparticulartypeofhost cell.Thisspecificityoccursbecausethevirusgenetic materialmust becompatiblewith thehost cell geneticmaterial for theviral genetic materialto beinserted into thehost cell chromosome.

B. Viruses can beshed without causingdiseasesymptoms.

C. Manyvirusescan enter alatent stageduringwhich they don’tcausediseasesymptoms. Duringthelatent stagetheviral geneticmaterial hasbeeninsertedinto thehost cellchromosome.

D. Someviruses causecancer.

25. ChoosetheINCORRECT statement:

A. Chlamydia can leadto sterility in eithersex.

B. HPVcan causepelvicinflammatorydisease.

C. Cold soresarecaused byaherpesvirus.

D. Thebacterium that causes syphiliscan crosstheplacenta and infectafetusgrowingintheuterusifthemother hassyphilis

26. Which statementabout genital wartsisINCORRECT?

A. Thewartsgrowfaster in awoman whoisusingacontraceptivecontainingprogesterone.

B. You are not contagiousuntil the wartsappear

C. Thewartsmaytakeweeksto monthstoappear

D. Thewartsareextremelycontagious

E. Thewartsarecaused by avirus

27.What is thepurposeof theantigen thatisdisplayed on thesurfaceof amacrophage?

A. It indicatesthat the“invader”hasbeen capturedand theimmuneresponse can beshut

down.sick).

B. It secretesantibodies.

C. It fitsin areceptor on the“invader” and neutralizesit (prevents it from makingyou

D. It identifiesthetarget that the immuneresponseshould bedirectedagainst.

E. It causes thetarget to burst.

28. When bacteriainfectan animal,thenumber of bacteriainthebodyincreases gradually.Agraph of thegrowth of abacterial population isasmoothlyincreasingcurveasshown in graph 1.Aviral infection showsadifferent pattern. For awhilethereisno evidenceof infection, and thenthereisasuddenincreaseinthenumber of viruses. Thenumber staysconstant for atime; thenthereisanother suddenincrease. Thecurveof viral population growth lookslikeaseriesofsteps, asshown in graph b.Which of thefollowing correctlyexplainsthedifferencein thepatternsof growth of bacteriaand viruses?

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A. Virusesneed to rest between division cycles, but bacteriado not need rest.

B. Bacteriadividecontinuouslywith eachcell producingtwo newcells. Virusesreplicatewithin acelland hundredsor thousands can bereleased at once.

C. Thefood supplyto fuel division for bacteriais alwaysavailable. Thefood supplyforviruses isonlyavailable duringlimited times, andthesearethetimeswhen virusesreplicate.

D. Noneof theabove.

29. Whenyou moveinto the dorms, you learn that thereisagirlon the floor who hasaherpes infection in herthroat. Otherson thefloorareafraid that theymight catch herpesfrom usingthetoilet seatif shehasused it beforethem. You correctlyexplain:

A. You might, but it would beoral herpes(afever blister),likeshehas, and 80% ofAmericanshavethat.

B. You might. You better watchto seeif she wasin therebeforeyou.

C. Even ifyou doget it,you’ll haveobvioussymptoms, and it iseasilycured with anantibiotic.

D. Theonlywaythat could happenisif shelicked thetoilet seat when she wassheddingviruses, placing viruseson thetoilet seat.Of course,you wouldalso haveto sit on theseatimmediatelyafterward

30.Thereason that you usuallyonlyget chickenpox onceisthat:

A. Antibodiesremain forever and immediatelyneutralizethechickenpox virusifyouareever exposed toit again.

B. Suppressor Tcellsformthat immediatelysuppresstheinfection if you areeverexposed to thevirusagain

C. Chickenpox antigensareonlyeffectiveonce.

D. Macrophagescan no longer recognizethechickenpox virusasan invader.

E. MemoryBcellsand memoryTcellsformed thatmount animmuneresponse veryquicklyifyou areever exposed to thevirusagain.

ISINCERELYHOPETHATSOMETHING YOULEARNEDINTHISCLASSWILLHELPYOUTOLEADAHAPPIER, HEALTHIERLIFE.