Regeneration of oxaloacetate is essential for the citric acid cycle to be cyclical. (True or false?)

Regeneration of oxaloacetate is essential for the citric acid cycle to be cyclical.

Indicate whether the statement is true or false.

Which metabolic cycle or pathway is LEAST likely to be invoked during the biosynthesis of DNA?

A) citric acid cycle
B) glycolysis
C) gluconeogenesis
D) pentose phosphate pathway

Hypothetically, if electron pools existed in sufficient numbers for enzymes to use in metabolic reactions,

A) a higher diversity of cytochromes would likely be observed.
B) cytochromes would be unnecessary for cells and quinones would be more important.
C) Q-cycle reactions would no longer be necessary for electron transport, but the proton motive force would otherwise be unchanged.
D) most metabolic pathways for both anabolism and catabolism would have to be rewritten.

Which metabolic strategy does NOT invoke the proton motive force for energy conservation?

A) aerobic catabolism
B) anaerobic
C) chemoorganotrophy
D) photoautrophy

One example of an electron acceptor that can be used in anaerobic respiration is

A) NADH.
B) water.
C) nitrate.
D) FMN.

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Regeneration of oxaloacetate is essential for the citric acid cycle to be cyclical. (True or false?)

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