Question

What is the first growth phase also known as ___________.

1) G1
2) first gap
3) S
4) G2

Answer 1

The G1 phase, also known as the first gap, is the initial growth phase in the cell cycle where the cell expands and prepares for DNA replication. It is followed by the S phase, where DNA replication occurs, and then by the G2 phase, which preps the cell for division.

Step-by-step explanation:

The first growth phase of the cell cycle is known as the G1 phase, or first gap. During the G1 phase, the cell is actively engaged in growth and is accumulating the necessary components for later stages of the cell cycle, including the building blocks of chromosomal DNA, associated proteins, and sufficient energy reserves. This phase is essential as it prepares the cell for DNA replication which occurs during the subsequent S phase (synthesis phase).

Following the G1 phase, if a cell is destined to divide, it will enter the S phase where DNA replication occurs. After completing the S phase, the cell will transition into the G2 phase, which involves final preparations for cell division. In the G2 phase, the cell also checks for any DNA damage and ensures that all cellular components are ready for mitosis or meiosis.