Ch.19 Lehninger biochem test bank study guide

Ch. 19 Lehninger biochem test bank
h h h h h




1.hAlmosthallhofhthehoxygenh(O2)honehconsumeshinhbreathinghishconvertedhto:h



A)hacetyl-CoA.h

B)hcarbonhdioxideh(CO2).h

C)hcarbonhmonoxidehandhthenhtohcarbonhdioxide.h

D)hNonehofhthehaboveh

E)hwater.h-hE



2.hWhichhofhthehfollowinghelectronhcarriershishnothablehtohtransferhonehelectronhathah me?h



A)hNADH

B)hFMN

C)hFAD

D)hUbiquinone

E)hHemeh-hA



3.hAhnewhcompoundhisolatedhfromhmitochondriahishclaimedhtohrepresenthahpreviouslyhunrecognizedhcarrie
rhinhthehelectronhtransferhchain.hIthishgivenhthehnamehcoenzymehZ.hWhichhlinehofhevidencehdohyouhfeelhishth
ehleasthconclusivehinhassigninghthishcompoundhahposi onhinhthehelectronhtransferhchain?h



A)hAlternatehoxida onhandhreduc onhofhthehmitochondrion-
boundhcoenzymehZhcanhbehreadilyhdemonstrated.h

B)hRemovalhofhcoenzymehZhfromhthehmitochondriahresultshinhahdecreasedhratehofhoxygenhconsump on.h

C)hThehratehofhoxida onhandhreduc onhofhmitochondrion-
boundhcoenzymehishofhthehsamehorderhofhmagnitudehashthehoverallhratehofhelectronhtransferhinhmitochond
riahashmeasuredhbyhoxygenhconsump on.h

D)hThehreduc onhpoten alhofhZhishbetweenhthathofhtwohcompoundshknownhtohpar cipatehinhthehelectronht
ransporthchainh

, E)hWhenhaddedhtohahmitochondrialhsuspension,hcoenzymehZhishtakenhuphveryhrapidlyhandhspecificallyhbyhth
ehmitoch-hE



4.hAn mycinhAhblockshelectronhtransferhbetweenhcytochromeshbhandhc1.hIfhintacthmitochondriahwerehincu
batedhwithhan mycinhA,hexcesshNADH,handhanhadequatehsupplyhofhO2,hwhichhofhthehfollowinghwouldhbehfo
undhinhthehoxidizedhstate?h



A)hCoenzymehQh

B)hCytochromeha3h

C)hCytochromehbh

D)hCytochromeheh

E)hCytochromehfh-hB



5.hReducedhQH2hishnothformedhbyhwhichhofhthehfollowing?h



A)hComplexhIhandhNADH

B)hComplexhIIhandhsuccinate

C)hComplexhIIIhandhcytochromehc

D)hFa yhacidhoxida on

E)hOxida onhofhglycerol-3-phosphateh-hC



6.hInhthehreoxida onhofhQH2hbyhpurifiedhubiquinone-
cytochromehchreductaseh(ComplexhIII)hfromhhearthmuscle,hthehoverallhstoichiometryhofhthehreac onhrequir
esh2hmolhofhcytochromehchperhmolehofhQH2hbecause:h



A)hcytochromehchishahone-electronhacceptor,hwhereashQH2hishahtwo-electronhdonor.h

B)hcytochromehchishahtwo-electronhacceptor,hwhereashQH2hishahone-electronhdonor.h

C)hcytochromehchishwaterhsolublehandhoperateshbetweenhthehinnerhandhouterhmitochondrialhmembranes

D)hhearthmusclehhashahhighhratehofhoxida vehmetabolism,handhthereforehrequireshtwicehashmuchhcytochro
mehchashQH2hforhelectronhtransferhtohproceedhnormally.h

E)htwohmoleculeshofhcytochromehchmusthfirsthcombinehphysicallyhbeforehtheyharehcataly callyhac ve.h-hA