What is the primary difference between catabolism and anabolism?

• A. Catabolism involves the synthesis of molecules and requires energy, while anabolism involves the breakdown of molecules and releases energy.
• B. Both catabolism and anabolism involve the breakdown of molecules and release energy.
• C. Both catabolism and anabolism involve the synthesis of molecules and require energy.
• D. Catabolism involves the breakdown of molecules and releases energy, while anabolism involves the synthesis of molecules and requires energy.

Answer: (D)