The reaction catalyzed by pyruvate carboxylase is an example of a(n)______ reaction because it replenishes the citric acid cycle intermediates that have been siphoned off for use in other reactions.
A)amphibolic
B)amphipathic
C)anaplerotic
D)cataplerotic
E)none of the above

Question

The reaction catalyzed by pyruvate carboxylase is an example of a(n)______ reaction because it replenishes the citric acid cycle intermediates that have been siphoned off for use in other reactions.
A)amphibolic
B)amphipathic
C)anaplerotic
D)cataplerotic
E)none of the above

Quizplus · Accepted Answer

An anaplerotic reaction is one that replenishes the intermediates of a metabolic pathway that have been used up for other processes. Pyruvate carboxylase catalyzes the conversion of pyruvate to oxaloacetate, which enters the citric acid cycle and replenishes its intermediates. Therefore, the reaction catalyzed by pyruvate carboxylase is an example of an anaplerotic reaction.

The Reaction Catalyzed by Pyruvate Carboxylase Is an Example of A(n)______