Question

question 15 (1 point)
how many turns of the citric acid cycle are required for one molecule
of glucose that originally entered glycolysis?
2
1
4
3

Explanation:

1. Recall glycolysis: One glucose molecule is broken down into 2 pyruvate molecules during glycolysis.
2. Recall pyruvate oxidation and citric acid cycle: Each pyruvate is converted to acetyl - CoA, and each acetyl - CoA enters one turn of the citric acid cycle. Since one glucose gives 2 pyruvates (and thus 2 acetyl - CoA molecules), the citric acid cycle must turn 2 times to process the products from one glucose molecule.

Answer:

A. 2