NEET BIOLOGY

Detailed explanation-1: -Interphase is composed of G1 phase (cell growth), followed by S phase (DNA synthesis), followed by G2 phase (cell growth). At the end of interphase comes the mitotic phase, which is made up of mitosis and cytokinesis and leads to the formation of two daughter cells.

Detailed explanation-2: -Hence the correct sequence of phases of cell cycle is: G1 → S → G2 → M.

Detailed explanation-3: -Cell division occurs during M phase, which consists of nuclear division (mitosis) followed by cytoplasmic division (cytokinesis). The DNA is replicated in the preceding S phase; the two copies of each replicated chromosome (called sister chromatids) remain glued together by cohesins.

Detailed explanation-4: -Cells in either mitosis or cell division (also called cytokinesis) are in the M phase, whereas those in the other three phases (G1, S, and G2) are in the interphase.