Final answer:
Tumor-suppressor genes inhibit cell division to prevent uncontrolled cell growth and are essential in preventing cancer. The gene p53 is a notable example that functions as a transcription factor to manage the cell cycle.
Step-by-step explanation:
In normal cellular processes, the genes that inhibit cell division are D) Tumor-suppressor genes. These genes code for proteins that function as anti-proliferation signals and suppress mitosis and cell growth, thus preventing uncontrollable cell growth and the potential development of cancers. The most well-known tumor-suppressor gene is p53, which acts as a transcription factor to control the cell cycle. These genes are crucial in maintaining normal cell function and preventing the progression of cancer by halting cell division when there is DNA damage or other cellular problems.
Tumor suppressor genes are genes that inhibit cell division. They function as negative regulators of the cell cycle, putting up a roadblock to cell cycle progression until certain events are completed. These genes prevent uncontrolled cell growth and play a critical role in preventing tumor formation. Examples of tumor suppressor genes include p53, Rb, and p21.