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Assignment 5 biochem
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Which enzymes in the citric acid cycle catalyze oxidative decarboxylation reactions?
isocitrate dehydrogenase and the alpha-ketoglutarate dehydrogenase complex
The following structures of cyt c in different organisms indicate
a and b, cyt c undergoes little change during evolution and cyt c is highly conserved
Alpha-ketoglutarate dehydrogenase is most similar to which of the following?
pyruvate dehydrogenase
Which of the following glycolytic enzymes is not use in gluconeogenesis?
hexokinase
The regulatory enzymes in gluconeogenesis are
glucose-6-phosphate, fructose-1,6-bisphosphate, pyruvate carboxylas, and phosphoenolpyruvate carboxykinase
The one enzyme that use iron-sulfer cluster for function in the TCA cycle is
aconitase
The one reaction of the TCA cycle that is an example of substrate level phosphorylation is catalyzed by
succinyl CoA synthetase
The major anapleurotic reaction that refills the TCA cycle with oxaloacetate is catalyzed by
pyruvate carboxylase
The accepting of electrons by which of the following directly contributes to the recycle of NAD+?
FMN
In the second half of the mitochondrial Q cycle, QH
2
donates one electron to cytochrome c, the second electron is passed to.
CoQ
.
-
(the semi-reduced version of CoQ)
The one reaction of the TCA cycle that produces GTP is catalyzed by
succinyl CoA synthetase
The coupling of electron transport and ATP synthesis is mediated by
the proton gradient across the inner mitochondrial membrane
Which of the following enzyme complex is not a proton pump.
Succinate-Q reductase
Which of the following enzyme complex has the lowest average standard reduction potential?
NADH-Q oxidoreductase
Which of the following component is the converge point of electrons from NADH and FADH
2
CoQ
Which of the following reaction is catalyzed by Q-cytochrome cOxidoreductase
QH2+ 2 Cyt c ox+ 2H+matrix→ Q + 2 Cyt c red+ 4H+cytoplasm
The mechanism Cyt C oxidase used to create proton gradient is/are
a) pump proton out of the inner membrane
c) use matrix proton to make H2O
Which of the following reaction is catalyzed by Catalase?
2O2·-+ 2H+↔O2+ H2O2
The Q cycle
Facilitate the transfer of 2 electrons from QH2to the single electron carrier
Which enzymes in the citric acid cycle catalyze reactionsthat produce NADH?
isocitrate dehydrogenase, alpha-ketoglutarate dehydrogenase, and malate dehydrogenase
Author
zzto
ID
291467
Card Set
Assignment 5 biochem
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Assignment 5 biochem
Updated
2014-12-14T03:01:45Z
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