Cellular metabolism refers to all the chemical reactions that take place within a cell, which are necessary for maintaining life. These reactions involve breaking down nutrients from food into energy (ATP), building and repairing molecules such as proteins and DNA, and carrying out various other essential functions.
Cellular metabolism is divided into two main categories: anabolism and catabolism. Anabolism involves the synthesis of complex organic compounds from simpler ones, while catabolism involves the breakdown of these complex molecules to release energy or produce simpler substances that can be used by the cell.
Overall, cellular metabolism is a highly regulated process that ensures cells have the necessary resources and energy to carry out their functions effectively.