Gene Mutation question...?

Mutations in the "ras" gene can lead to loss of the ability of the G protien to hydrolyze GTP. The mutant "ras" stimulates cell division in the absence of receptor signaling, and is an example of a(an) ________. Mutations producing the BRCA 1 gene product have a decreased ability to repair damaged chromosomes and lead to an 85% incidence of breast or ovarian cancer by the age of 60. BRCA 1 is an example of a(an) ________%26gt;





1. Stability gene; proto-oncogene


2. tumor supressor gene; stability gene


3. proto-oncogene; oncogene


4. oncogene; stability gene


5. tumor supressor gene; oncogene

Gene Mutation question...?
BRCA1 is a tumor supressor gene... so none of your answers match.





Ras is an oncogene
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