AP BIOLOGY

Detailed explanation-1: -Cells spend most of their time in a stage called interphase. During this phase, the nuclear envelope surrounds the nucleus. There may be one or more nucleoli (dark, condensed regions) visible within the nucleus.

Detailed explanation-2: -M phase. During the mitotic (M) phase, the cell divides its copied DNA and cytoplasm to make two new cells.

Detailed explanation-3: -The interphase is the period when the cell is in a non-dividing state and this can be in different stages: the first gap (G1) between the last mitosis and the S phase (phase of DNA synthesis) and the second gap (G2) between the completion of the S phase and the next mitosis (M).

Detailed explanation-4: -A cell enters the interphase before it undergoes another cycle of division because it requires to double its DNA content. Interphase is that phase of the cell cycle in which the cell grows and duplicates its DNA before entering mitosis of another cell cycle.

Detailed explanation-5: -Hence, Interphase is the longest phase of cell division. In a 24-hour cell cycle, 23 hours are for the Interphase-phase and 1 hour for the Mitosis phase.