Question

When do cells of multicellular organisms proliferate?

Answer 1

Cellular proliferation:

1. An increase in the number of cells as a result of cell growth and cell division is called cell proliferation.
2. Cells of multicellular organisms proliferate when instructed by hormones or growth factors.
3. Cyclin and Cdk complexes at the checkpoints of the cell cycle regulate the process.
4. Cancer cells don't abide by checkpoints and therefore cause tumorigenesis.