Catabolism is the breaking down of molecules.

Catabolism is the breaking down of molecules.

• A. Catabolism
• B. Metabolism
• C. Exergonic Reactions
• D. Anabolism

Answer: (A)

The main idea tested is what catabolism means. Catabolism refers to breaking down complex molecules into simpler ones, with the release of energy stored in chemical bonds. That direct meaning is why it fits the statement perfectly. Metabolism is the overall set of all chemical reactions in a cell, not just the breakdown process. Anabolism is the construction of larger molecules from smaller ones and requires energy. Exergonic reactions describe energy release, which often accompanies catabolic steps, but they describe energy change rather than the act of breaking down. So catabolism is the term that directly captures the idea of breaking down molecules.

The main idea tested is what catabolism means. Catabolism refers to breaking down complex molecules into simpler ones, with the release of energy stored in chemical bonds. That direct meaning is why it fits the statement perfectly. Metabolism is the overall set of all chemical reactions in a cell, not just the breakdown process. Anabolism is the construction of larger molecules from smaller ones and requires energy. Exergonic reactions describe energy release, which often accompanies catabolic steps, but they describe energy change rather than the act of breaking down. So catabolism is the term that directly captures the idea of breaking down molecules.