G0 is best described as what phase?

G0 is best described as what phase?

• A. A phase of cell cycle arrest.
• B. A phase of rapid growth.
• C. A stage of mitosis.
• D. A stage of DNA replication.

Answer: (A)

G0 is a quiescent, non-dividing state in which cells have exited the active cell cycle. They’re not undergoing growth, DNA replication, or mitosis, but many cells can remain metabolically active and may re-enter the cycle if conditions demand it. This makes G0 best described as a phase of cell cycle arrest rather than a stage of division or DNA synthesis. Some cells, like certain neurons, stay in G0 permanently, while others can return to the cycle when growth signals appear. In contrast, mitosis is the division phase, and DNA replication occurs during the S phase, so those options don’t describe G0.

G0 is a quiescent, non-dividing state in which cells have exited the active cell cycle. They’re not undergoing growth, DNA replication, or mitosis, but many cells can remain metabolically active and may re-enter the cycle if conditions demand it. This makes G0 best described as a phase of cell cycle arrest rather than a stage of division or DNA synthesis. Some cells, like certain neurons, stay in G0 permanently, while others can return to the cycle when growth signals appear. In contrast, mitosis is the division phase, and DNA replication occurs during the S phase, so those options don’t describe G0.