Question

1. which of the following terms refers to the set of processes for building up and breaking down molecules necessary for life?

respiration
anabolism
catabolism
metabolism

Explanation:

Respiration is mainly about gas - exchange and energy - release. Anabolism is the building - up process only, and catabolism is the breaking - down process only. Metabolism encompasses both building - up (anabolic) and breaking - down (catabolic) processes necessary for life.

Answer:

D. metabolism