Question

Which of the following is not produced during the Krebs cycle?

A. Carbon dioxide
B. NADH
C. FADH₂
D. ATP
E. All of these are produced during the Krebs cycle.

Answer 1

The Krebs cycle produces carbon dioxide, NADH, and FADH₂ but does not directly produce ATP.

Step-by-step explanation:

The Krebs cycle, also known as the citric acid cycle, is a series of chemical reactions that occur in the mitochondria of cells. It is an important part of cellular respiration, which is the process by which cells convert glucose into energy. During the Krebs cycle, several molecules are produced, including carbon dioxide, NADH, FADH₂, and ATP.

However, ATP is not directly produced during the Krebs cycle. Instead, ATP is generated through oxidative phosphorylation, which occurs in the electron transport chain. The high-energy molecules NADH and FADH₂, produced during the Krebs cycle, donate electrons to the electron transport chain, leading to the generation of ATP.