Question

1. which of the following is true about aerobic cellular respiration?

a. produces 2 total atp per glucose and requires oxygen
b. produces 2 total atp per glucose and does not use oxygen
c produces 32 total atp and requires oxygen
d. produces 32 total atp per glucose and does not use oxygen
e. none of the above are true

Explanation:

Aerobic cellular respiration is a process that occurs in the presence of oxygen. It involves three main stages: glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation. Through these stages, a single molecule of glucose is completely oxidized. Glycolysis produces a small amount of ATP (net gain of 2 ATP), but the majority of ATP is generated during oxidative phosphorylation. Overall, aerobic respiration yields approximately 32 - 38 ATP molecules per glucose molecule (the exact number can vary slightly depending on the cell type and specific conditions). Since it is called "aerobic", it requires oxygen as the final electron acceptor in the electron transport chain.

• Option a: Incorrect. 2 ATP per glucose is a very low yield (glycolysis alone has a net gain of 2 ATP, but aerobic respiration is more extensive).
• Option b: Incorrect. It does not produce only 2 ATP and it requires oxygen.
• Option c: Correct. It produces a higher amount of ATP (around 32) and requires oxygen.
• Option d: Incorrect. It requires oxygen.
• Option e: Incorrect as option c is correct.

Answer:

C. produces 32 total ATP and requires oxygen