Question

multiple choice question
which of the following describes a catabolic reaction?
o large protein molecules are broken down into smaller amino acids during digestion.
o molecules of iron combine with oxygen, giving up electrons and forming iron oxide (rust).
o small glucose molecules are linked together to form a larger molecule like starch.

Explanation:

Catabolic reactions break down larger molecules into smaller ones, releasing energy. Protein digestion into amino - acids is a catabolic process. The iron - oxygen reaction is oxidation, and glucose linking is an anabolic process.

Answer:

Large protein molecules are broken down into smaller amino acids during digestion.