Suppose a human metabolic disease only allows electrons to be used from NADH and not FADH2. What is a
probable cause of this disease?
a. a defect in assembly protein genes for complex II of the electron transfer system
b. enzyme defects in glycolysis and the citric acid cycle
c. a deficient amount of cytochrome c and coenzyme Q
d. improper regulation of phosphofructokinase
e. inability of oxygen to act as a final electron acceptor
ANSWER: a
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