Question

how do proto-oncogenes and tumour suppressor genes normally regulate the cell cycle

Answer 1

Answer:

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Explanation:

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Answer 2

Proto-oncogenes positively regulate the cell.

• They influence the cell cycle beneficially. Proto-oncogenes can naturally become oncogenes as a direct result of specific mutations, disrupting normal cell division and causing cancer.

• Some mutations prohibit the cell from reproducing, preventing the mutations from being moved on to emerging generations.

• Tumor suppressor gene type for proteins limits cellular growth and encourages systematic cell death, in contrast to cellular proliferation-stimulating action of proto-oncogenes that propel the cell cycle forward.