The TCA cycle must turn ________ time(s) to completely metabolize the pyruvic acid produced from one glucose molecule.
A) one
B) two
C) three
D) four
E) five

Question

Quizplus · Accepted Answer

The TCA cycle (also known as the Krebs cycle or citric acid cycle) requires two turns to completely metabolize the pyruvic acid produced from one glucose molecule. This is because each pyruvic acid molecule is converted to acetyl CoA, which enters the TCA cycle and is metabolized through a series of reactions to produce ATP, CO2, and water. The TCA cycle occurs in the mitochondria of cells and is a central component of aerobic respiration.

The TCA Cycle Must Turn ________ Time(s) to Completely Metabolize