CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -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-2: -Cells usually remain in G1 for about 10 hours of the 24 total hours of the cell cycle. The length of S phase varies according to the total DNA that the particular cell contains; the rate of synthesis of DNA is fairly constant between cells and species. Usually, cells will take between 5 and 6 hours to complete S phase.

Detailed explanation-3: -Cell-cycle control depends exclusively on post-transcriptional mechanisms that involve the regulation of Cdk activity by phosphorylation and the binding of regulatory proteins such as cyclins, which are themselves regulated by proteolysis.

Detailed explanation-4: -Interphase is the phase of the cell cycle in which a typical cell spends most of its life. During interphase, the cell copies its DNA in preparation for mitosis. It is the longest stage of cell cycle.

Detailed explanation-5: -The cell cycle vary among different types of cells in the duration of the cell cycle. Explanation: For a typical proliferating human cell with a cell cycle time of 24 hours, the phase may last up to 11 hours, the S phase lasts for about 8 hours, the phase about 4 hours and the M phase about 1 hour.