The three statements that correctly describe cellular respiration are:
A. Water is a byproduct of the Krebs cycle.
B. The Krebs cycle occurs in the mitochondrion.
D. Oxygen is required for the electron transport chain.
Explanation:
- Statement A: Water is indeed a byproduct of the Krebs cycle.
- Statement B: The Krebs cycle, also known as the citric acid cycle or TCA cycle, occurs in the mitochondria.
- Statement D: The electron transport chain requires oxygen as the final electron acceptor.
The incorrect statements are:
- C: The electron transport chain occurs in the inner mitochondrial membrane, not in the cytosol.
- E: While electrons are carried from glycolysis and the Krebs cycle by NADH and FADH2, this statement is not as precise as the others in describing cellular respiration.
- F: Glycolysis does not result in the most ATP molecules; the electron transport chain produces the most ATP during cellular respiration.