Final answer:
Cells do grow during mitotic S phase (synthesis phase of interphase) as they undergo DNA replication.
Step-by-step explanation:
During the S phase (synthesis phase) of interphase, cells undergo DNA replication, which means the cells do grow in size. The S phase is the period during which a cell replicates its DNA.
The S phase is followed by the Gā phase (second gap), during which the cells replenish energy stores and synthesize proteins necessary for chromosome manipulation and movement. Some additional cell growth may occur during Gā, before the cell enters the first stage of mitosis.
Overall, the interphase of the cell cycle involves growth and protein synthesis, including DNA replication, which occurs during the S phase.