Description of this paper

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

Description

solution


Question

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?;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.

 

Paper#62612 | Written in 18-Jul-2015

Price : $22
SiteLock