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
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
