Anabolism is defined as the process of building up large proteins from amino acids.

• A. Anabolism
• B. Catabolism
• C. Metabolism
• D. Digestion

Answer: (A)

Anabolism is a form of biosynthesis where smaller molecules are assembled into larger, more complex ones. Building proteins from amino acids is a classic example, and it typically requires energy input to form the peptide bonds and assemble the polypeptide chain. This focus on creating complex molecules from simpler components is exactly what anabolism describes.

In contrast, catabolism breaks down large molecules into smaller ones, releasing energy; digestion is a specific type of catabolic process that occurs in the digestive system to break down nutrients for absorption. Metabolism, meanwhile, is the umbrella term for all biochemical reactions in the body, including both anabolic and catabolic pathways.