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The cell cycle is a highly regulated process that functions in maintaining the balance of new cell growth and cell death in healthy tissues. What is responsible for turning this cycle on and off?Select one:a.Cell-cycle suppressor genesb.Mutationsc.Growth-regulating genesd.Proteins on the cell membrane

Question

The cell cycle is a highly regulated process that functions in maintaining the balance of new cell growth and cell death in healthy tissues. What is responsible for turning this cycle on and off?Select one:a.Cell-cycle suppressor genesb.Mutationsc.Growth-regulating genesd.Proteins on the cell membrane

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Solution

The cell cycle is regulated by both cell-cycle suppressor genes and growth-regulating genes.

Cell-cycle suppressor genes (option a) are responsible for halting the cell cycle to prevent uncontrolled cell division, which could lead to cancer. They act as the "off" switch in the cell cycle.

Growth-regulating genes (option c), on the other hand, promote cell division and act as the "on" switch in the cell cycle. They ensure that cells divide when necessary, for example during growth or to replace damaged cells.

Therefore, both a. Cell-cycle suppressor genes and c. Growth-regulating genes are responsible for turning the cell cycle on and off.

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