The sum total of all the chemical reactions that occur in organisms is called ______.
A) summation
B) cellular synthesis
C) replication
D) metabolism

Question

Quizplus · Accepted Answer

Metabolism refers to all the chemical reactions that take place within an organism, including those that generate energy and those that synthesize new molecules. It includes two processes: catabolism (breaking down of molecules) and anabolism (building up of molecules). Option A is incorrect as summation does not refer to any biological process, while option B is incorrect as cellular synthesis is a term that refers to the production of new cells in the body. Option C is incorrect as replication only refers to the process of DNA copying itself during cell division.

The Sum Total of All the Chemical Reactions That Occur