LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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it allows cell division to occur indefinitely if there is an error in the cell cycle.
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it stops the division of the cell until errors can be corrected.
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it plays no role in cancer prevention.
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it prevents tumors by allowing the cell to continue with cell division.
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Detailed explanation-1: -Tumor suppressor genes are normal genes that slow down cell division or tell cells to die at the right time (a process known as apoptosis or programmed cell death). When tumor suppressor genes don’t work properly, cells can grow out of control, which can lead to cancer.
Detailed explanation-2: -Tumor suppressor genes represent the opposite side of cell growth control, normally acting to inhibit cell proliferation and tumor development. In many tumors, these genes are lost or inactivated, thereby removing negative regulators of cell proliferation and contributing to the abnormal proliferation of tumor cells.
Detailed explanation-3: -A gene that makes a protein that is found inside the nucleus of cells and plays a key role in controlling cell division and cell death. Mutations (changes) in the p53 gene may cause cancer cells to grow and spread in the body.
Detailed explanation-4: -Oncogenes are the main genes contributing to the conversion of normal cells to cancer cells and tumor-suppressive genes block the development of cancer. The way they both act is complicated and needs further investigation to fully elucidate cancer pathways and carcinogenesis.