Difficulty: Medium
Average Score: 68%
Entry Exam
Which of the following is not a product of the Krebs cycle?
Correct answer
B
Rationale
The correct answer is B, 'oxygen.' The Krebs cycle, also known as the citric acid cycle, is a series of chemical reactions that produce energy-rich molecules like ATP, carbon dioxide, and energy carriers such as NADH and FADH2. Oxygen is not a direct product of the Krebs cycle but is essential for the electron transport chain, which follows the Krebs cycle and is where oxygen is used as the final electron acceptor.