What cellular process (es) is/are responsible for the increase in protein content associated with the gap phases of the cell cycle?

Protein/enzyme synthesis

Explanation:

The process of synthesis of protein in the cell is mainly responsible for the increase in the protein content of the cell.

The process which is also known as the translation process of gene expression takes place at the G1 and G2 phases of the interphase of the cell cycle.

During protein synthesis, mRNA synthesized in the nucleus are transported to the cytoplasm and the genetic codes on the mRNA are translated into their respective amino acids linked together by polypeptide bonds. The protein are then folded in specific ways for specific enzymes.