Final answer:
Cell growth occurs during the G1 and G2 phases, which are times for growth and preparation for mitosis is True (option 1)
Step-by-step explanation:
The statement that cell growth occurs only in the gap phases, G1 and G2, is not entirely true. While significant cell growth and functions such as accumulating energy reserves, proteins, and DNA building blocks do occur during the G1 phase (first gap phase) and G2 phase (second gap phase), these are not the sole stages where growth happens. The S phase (synthesis phase), which falls between G1 and G2 within interphase, is a period where the cell replicates its DNA, effectively doubling its DNA content, although the cell remains diploid. This DNA replication is crucial for the preparation of cell division.
The G1 phase is characterized by rapid cell growth and routine functions of the cell, including biosynthetic activities and energy accumulation. Following G1, the S phase sees the DNA replication necessary for producing two genetically identical daughter cells. Afterward, during the G2 phase, there is further growth as the cell prepares components needed for mitosis and cell division, such as microtubules for the mitotic spindle. Therefore, cell growth is not exclusive to the G1 and G2 phases but is also integral during the S phase of the cell cycle.