Question

Explain the cell cycle

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:

The cell cycle is an ordered series of events involving cell growth and cell division that produces two new daughter cells. Cells on the path to cell division proceed through a series of precisely timed and carefully regulated stages of growth, DNA replication, and division that produces two identical (clone) cells. The cell cycle has two major phases: interphase and the mitotic phase (Figure 1). During interphase, the cell grows and DNA is replicated. During the mitotic phase, the replicated DNA and cytoplasmic contents are separated, and the cell divides.