• The interphase is also known as the preparatory phase of the cell cycle.
• During this period although the cell is said to be in a resting phase, it is metabolically quite active.
• It is the time during which the cell prepares itself for division by enduring both DNA replication and cell growth in a sequential and orderly manner and it is completed in three steps.
i. G1 (Gap 1) phase- It involves RNA and protein synthesis.
ii. S (Synthesis) phase – It involves DNA replication. Throughout this time the amount of DNA double per cell. In animal cells, during the S phase DNA replication takes place in the nucleus, and the centriole replicates in the cytoplasm.
iii. G2 (Gap 2) phase – It also involves RNA and protein synthesis.
Answered by Pragya Singh | 1 year agoAnalyse the events during every stage of cell cycle and notice how the following two parameters change
(i) number of chromosomes (N) per cell
(ii) amount of DNA content (C) per cell
Can there be mitosis without DNA replication in the ‘S’ phase?
Discuss with your teacher about
(i) haploid insects and lower plants where cell-division occurs.
(ii) some haploid cells in higher plants where cell-division does not occur.
Distinguish anaphase of mitosis from anaphase 1 of meiosis.