Question

Which of the following is the correct sequence of cell cycle? The correct answer is

• A. ${{G}_{1}}\to {{G}_{2}}\to S\to M$
• B. $S\to M\to {{G}_{2}}\to {{G}_{1}}$
• C. ${{G}_{1}}\to S\to {{G}_{2}}\to M$
• D. $M\to S\to {{G}_{2}}\to {{G}_{1}}$

Answer 1

Answer: (C)

Cell cycle is the sequence of stages that a cell passes through between one cell division and the next. The cell cycle can be divided into four main sages: (i) M-phase, which consists of mitosis (nuclear division) and cytokinesis (cytoplasmic division), (ii) Gi -phase, in which there is a high race of biosynthesis and growth (iii) S-phase, in which the DNA content of the cell doubles and me chromosomes replicate; (iv) the G2 -phase, during which die final preparations of cell division are made.