Tumor suppressor genes a. normally increase the rate of cell...

Tumor suppressor genes
a. normally increase the rate of cell proliferation.
b. normally promote cell migration.
c. include those encoding enzymes that degrade cell adhesion proteins.
d. include those that encode DNA repair proteins.

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Key Concepts

Tumor Suppressor Genes

These are genes that produce proteins responsible for controlling cell growth and division, repairing DNA, and initiating apoptosis when cellular damage is irreparable. Their proper function is crucial for preventing the uncontrolled cell proliferation that can lead to cancer, and mutations in these genes can remove this regulatory control, facilitating tumor development.

Cell Proliferation Regulation

This concept refers to the balance between positive and negative signals that control the frequency of cell division. In normal cells, tumor suppressor genes contribute to this regulation by halting the cell cycle or promoting cell death in response to DNA damage, ensuring that cells do not proliferate uncontrollably.

DNA Repair Mechanisms

These are critical processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome. Some tumor suppressor genes encode proteins that function in DNA repair, maintaining genomic integrity and preventing mutations that could lead to cancer.

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