sing 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.

Here’s a brief explanation for each:

• A: Water is indeed produced as a byproduct during the Krebs cycle and the entire cellular respiration process.
• B: The Krebs cycle (also known as the citric acid cycle) takes place in the mitochondria.
• D: The electron transport chain does require oxygen, as it serves as the final electron acceptor in the chain.

The other statements are incorrect for the following reasons:

• C: The electron transport chain occurs in the inner mitochondrial membrane, not in the cytosol.
• E: While electrons are carried from glycolysis (via NADH) and the Krebs cycle (also via NADH and FADH2), this statement is not as strong or specific as the others.
• F: Glycolysis produces only a small amount of ATP relative to the total yield from both glycolysis and the Krebs cycle combined with oxidative phosphorylation.