Question

Where is the R point in the cell cycle?

Towards the end of G₁

At the beginning of S

Towards the end of S

At the beginning of G₁

Towards the end of G₂

At the beginning of G₂

Answer 1

​​​​​​R point is a checkpoint towards the end of G1 phase in cell cycle.

Explanation :-

Step1 -Cell cycle is the series of events in a cell including growth and division. A cell cycle is divided in some stages like - Gap phase, synthesis phase, gap phase 2 and mitosis phase.

Step 2- there are some checkpoints in Gap phases for the ensuring of requirements of next phase.

Step - R point is found at end of G1 phase and called restriction point in eukaryotes. If DNA is damaged, at this point transcription factors work and cell cycle is stopped.

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