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In bacteria, binding of _________ factor to the RNA polymerase increases its affinity for promoter sites in the DNA.

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In bacteria, binding of _________ factor to the RNA polymerase increases its affinity for promoter sites in the DNA.

(a) alpha

(b) sigma

(c) rho

(d) beta

This question was addressed to me in an interview.

My question is from Gene Expression topic in portion Gene Expression of Cell Biology

1 Answer

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Best answer
Right answer is (b) sigma

The explanation: In bacteria, binding of the sigma factor to RNA polymerase enzyme increases the latter’s affinity for promoter sequences in the DNA.

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