Main products of Krebs cycle reactions are:
Correct answer: B. NADH and FADH₂
- A. Glucose and Oxygen
- B. NADH and FADH₂
- C. ATP and glyceraldehyde 3-phosphate (G3P)
- D. Pyruvate and Acetyl Co-A
Explanation
Each turn of the Krebs cycle releases carbon dioxide and passes the energy to the reduced carriers NADH and FADH2, which feed the electron transport chain. Glyceraldehyde 3 phosphate belongs to glycolysis and the Calvin cycle, and pyruvate and acetyl coenzyme A are made before the cycle begins.
This question appeared on the UHS MDCAT 2026 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
Practise Bioenergetics
1,379 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.