Qstnid -I-3- Describe The Events Taking Place During Interphase. - 10: Cell Cycle And Cell Division - Cbse-xi-biology

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CBSE-XI-Biology

10: Cell Cycle and Cell Division

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Qstn# I-3 Prvs-Qstn Next-Qstn

#3
Describe the events taking place during interphase.

Ans : Interphase involves a series of changes that prepare a cell for division. It is the period during which the cell experiences growth and DNA replication in an orderly manner. Interphase is divided into three phases.

(i) G₁ phase

(ii) S phase

(iii) G₂ phase

G₁ phase - It is the stage during which the cell grows and prepares its DNA for replication. In this phase, the cell is metabolically active.

S phase - It is the stage during which DNA synthesis occurs. In this phase, the amount of DNA (per cell) doubles, but the chromosome number remains the same.

G₂ phase - In this phase, the cell continues to grow and prepares itself for division. The proteins and RNA required for mitosis are synthesised during this stage.