The process of resynthesis of food materials from simpler food molecules is called

When is wear and tear experienced in a living organism?

Assertion $A$: Many molecules participate in biochemical reactions.
Reason $R$: Biochemical reactions are metabolic reactions.
Which option is correct for Assertion $A$ and Reason $R$?

The total heat content of a system is known as:

What is the collective term for the various biochemical reactions occurring within the cells of a living organism?

The sum total of all the chemical reactions occurring in our body is known as