Question

Describe G1, S, G2, G0 and the checkpoints in the eukaryotic cell cycle

Answer 1

The eukaryotic cell cycle consists of phases G1, S, G2, and G0. There are three checkpoints: G1, S, and mitosis, which ensure proper cell division.

Step-by-step explanation:

The eukaryotic cell cycle consists of several phases:

1. G1 phase: Also known as the Gap 1 phase, it is the period when the cell grows and carries out its normal functions.
2. S phase: Also known as the Synthesis phase, it is the phase where the cell replicates its DNA.
3. G2 phase: Also known as the Gap 2 phase, it is the period after DNA replication but before cell division. The cell continues to grow and prepares for mitosis.
4. G0 phase: This is a resting stage where cells exit the cell cycle and enter a non-dividing state.

There are also three checkpoints in the eukaryotic cell cycle:

1. G1 checkpoint: Just before entry into the S phase, it checks if the cell is big enough to divide.
2. S checkpoint: During DNA synthesis, it ensures that the DNA has been replicated properly.
3. Mitosis checkpoint: In metaphase, it ensures that all the chromosomes are properly aligned before the cell is allowed to divide.