Question

explain G1 phase, G2 phase and S phase ​

Answer 1

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'G1'PHASE (GAP 1) :-

1⃣G1 is called first gap and growth phase. It is the preaparotory phase for the onncomming divisions.

2⃣The cells grows in size, besides synthesising rna and proteins.

3⃣No change occurs in dna content. G1 phase is most variable with regard to duration.Some cells that no longer divinde may enter into a resting phase (G0 phase).

'S' PHASE :-

1⃣this phase is also known as synthesis phase.

2⃣During this phase replication of DNA and synthesis of histone proteins occur.

3⃣The chromosomes are duplicated.

'G2' PHASE (GAP2) :-

1⃣this is a second gap or growth phase of interphase.

2⃣In this phase synthesis of RNA and protien continues which is required for the cell growth.

3⃣Two centrodomes are formed by replication of a single chromosome. As the G2 phase, draws to a close, the cell enters into the Mitotic phase.

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Answer 2

Answer:

Explanation:

The G stands for gap and the S stands for synthesis. The G1 and G2 phases are times of growth and preparation for major changes. The synthesis phase is when the cell duplicates the DNA in its entire genome. The three phases of interphase also allow for checkpoints to ensure that things are working properly.

DNA replication occurs during this S (synthesis) phase. Gap 2 (G2): During the gap between DNA synthesis and mitosis, the cell will continue to grow and produce new proteins. At the end of this gap is another control checkpoint (G2 Checkpoint) to determine if the cell can now proceed to enter M (mitosis) and divide.

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