Using the model, select three statements that correctly describe cellular respiration.

Question

A.
Water is a byproduct of the Krebs cycle.

B.
The Krebs cycle occurs in the mitochondrion.

C.
The electron transport chain occurs in the cytosol.

D.
Oxygen is required for the electron transport chain.

E.
Electrons are carried from glycolysis and the Krebs cycle.

F.
Glycolysis results in the most ATP molecules being formed.

Answer 1

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.