Define metabolism.

(N/A) $\rightarrow$ Metabolism is the sum total of all chemical reactions occurring within a living organism.
$\rightarrow$ It consists of two types of processes:
$1$. Anabolism: These are constructive or building-up reactions,such as photosynthesis,where complex molecules are synthesized from simpler ones.
$2$. Catabolism: These are destructive or breakdown reactions,such as respiration,where complex molecules are broken down into simpler ones to release energy.