NEET BIOLOGY

Detailed explanation-1: -A typical proliferating human cell divides on average every 24 h. This division timing allows cells to synchronize with other physiological processes and with the environment. The circadian clock, which orchestrates daily rhythms, directly regulates the cell division cycle and is a major synchronizing factor.

Detailed explanation-2: -For most human cells, a single cell cycle takes approximately 24 hours.

Detailed explanation-3: -The duration of these cell cycle phases varies considerably in different kinds of cells. For a typical rapidly proliferating human cell with a total cycle time of 24 hours, the G1 phase might last about 11 hours, S phase about 8 hours, G2 about 4 hours, and M about 1 hour.

Detailed explanation-4: -About 330 billion cells are replaced daily, equivalent to about 1 percent of all our cells.

Detailed explanation-5: -In 24 hour average duration of cell cycle of a human cell, cell division proper lasts for only about an hour.