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Which of the following about Rb tumor suppressor protein is correct?(a) It binds E2F transcription factor and prevents cell from entering S phase until a mitogenic signal is received(b) It is activated when phosphorylated by Cdk(c) It is a transcription factor(d) When a mitogenic signal is received, it binds the transcription factor E2F and thus stimulates the cell to enter S phase |
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Answer» Right option is (a) It binds E2F transcription factor and prevents cell from entering S phase until a mitogenic signal is received To explain I would say: Rb protein binds E2F transcription factor and prevents cell from entering S phase until a mitogenic signal is received. |
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