NEET BIOLOGY

Detailed explanation-1: -G1, S and G2 phases are all cumulatively referred to as interphase involving the growth of a cell and the replication of its DNA. Initially in G1 phase, the cell grows physically and increases the volume of both protein and organelles.

Detailed explanation-2: -The G1 phase, gap 1 phase, or growth 1 phase, is the first of four phases of the cell cycle that takes place in eukaryotic cell division. In this part of interphase, the cell synthesizes mRNA and proteins in preparation for subsequent steps leading to mitosis.

Detailed explanation-3: -Interphase consists of three steps: G 1start subscript, 1, end subscript phase: first gap phase; the cell grows larger and organelles are copied. S phase: synthesis phase; the cell synthesizes a complete copy of the DNA in its nucleus.

Detailed explanation-4: -During the second gap phase, or G 2start subscript, 2, end subscript phase, the cell grows more, makes proteins and organelles, and begins to reorganize its contents in preparation for mitosis.

Detailed explanation-5: -A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division.