How do the quantities of ATP formed during aerobic and anaerobic respiration compare? A. Two times more ATP is formed during aerobic respiration than during anaerobic respiration. B. Four times more ATP is formed during aerobic respiration than during anaerobic respiration. C. Eight times more ATP is formed during aerobic respiration than during anaerobic respiration. D. Eighteen times more ATP is formed during aerobic respiration than during anaerobic respiration.

D. 18 times more atp is formed during aerobic respiration than during anaerobic respiration

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To determine the comparison between the quantities of ATP formed during aerobic and anaerobic respiration, we need to understand the ATP production processes in each type of respiration.

Aerobic respiration occurs in the presence of oxygen and involves a series of metabolic reactions, such as glycolysis, the Krebs cycle, and the electron transport chain, which take place in the mitochondria. These reactions result in the production of a total of 36-38 ATP molecules per glucose molecule.

On the other hand, anaerobic respiration occurs in the absence of oxygen and consists of a single step: glycolysis. During glycolysis, glucose is broken down to form two molecules of pyruvate or lactic acid, and a small amount of ATP (2 molecules) is produced.

Therefore, comparing the quantities of ATP formed, we can conclude that the correct answer is A. Two times more ATP is formed during aerobic respiration than during anaerobic respiration.