During which phase does cell growth occur before DNA is duplicated?

The correct choice is the G1 Phase, which stands for Gap 1. This phase follows the previous mitotic phase (M Phase) and is primarily characterized by significant cellular growth and metabolism. During G1, the cell increases in size, produces RNA, synthesizes proteins, and generates the necessary components required for DNA replication, preparing itself for the upcoming S Phase.

In G1, the cell also assesses its environment and internal conditions to ensure that it is ready for DNA synthesis. This phase is crucial because it sets the stage for DNA replication by ensuring that the cell has adequate resources and energy to duplicate its genetic material effectively.

The other phases mentioned serve different roles in the cell cycle: the G2 Phase is focused on further growth and preparation for mitosis after DNA replication has occurred; the S Phase is where DNA replication actually takes place; and the M Phase includes the processes of mitosis and cytokinesis, where the cell divides into two daughter cells. Thus, the G1 Phase is specifically where cell growth occurs prior to DNA duplication.