Question

question 5 (1 point)
in step 3 of pyruvate oxidation, which of the following molecules binds to the acetyle group to bring it to the citric acid cycle?
ubiquinone
fumarate
coenzyme q
coenzyme a

Explanation:

To solve this, we recall pyruvate oxidation steps. In step 3, the acetyl group (from pyruvate's oxidation) binds to coenzyme A (CoA) to form acetyl - CoA, which then enters the citric acid cycle. Ubiquinone (or coenzyme Q) is involved in the electron transport chain, fumarate is an intermediate in the citric acid cycle, and they don't bind the acetyl group for transport to the citric acid cycle.

Answer:

D. coenzyme A