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Multiple Choice
The BRCA1 and BRCA2 genes are thought to be what type of genes?
A
Proto-oncogenes
B
Oncogenes
C
Viral genes
D
Transcription factor genes
E
Tumor-suppressor genes
Verified step by step guidance
1
Understand the role of BRCA1 and BRCA2 genes: These genes are involved in the repair of DNA damage, which is crucial for maintaining the stability of a cell's genetic material.
Learn about tumor-suppressor genes: These genes help prevent uncontrolled cell growth. When they function properly, they can suppress tumor formation by repairing DNA or initiating cell death if the damage is irreparable.
Differentiate between tumor-suppressor genes and other gene types: Proto-oncogenes promote cell growth and division, oncogenes are mutated proto-oncogenes that can lead to cancer, viral genes are part of viral genomes, and transcription factor genes regulate the expression of other genes.
Recognize the significance of BRCA1 and BRCA2 mutations: Mutations in these genes can lead to a failure in DNA repair mechanisms, increasing the risk of cancer, particularly breast and ovarian cancer.
Conclude that BRCA1 and BRCA2 are classified as tumor-suppressor genes because their normal function is to prevent the development of tumors by repairing DNA damage.