What is a regulatory protein for a gene? It binds to specific DNA sequences with high affinity and plays a predominant role in determining if a genome segment is transcribed or not.
A)the operator
B)the terminator
C)the promoter
D)the repressor
E)the structural genes

Question

Quizplus · Accepted Answer

The repressor is a regulatory protein that binds to specific DNA sequences, called operators, with high affinity. The binding of a repressor to an operator blocks the binding of RNA polymerase to the promoter, preventing transcription of the structural genes. Therefore, the repressor plays a predominant role in determining if a genome segment is transcribed or not. The operator, terminator, promoter, and structural genes are all involved in the process of transcription, but only the repressor is specifically responsible for regulating transcription by binding to operators.

What Is a Regulatory Protein for a Gene? It Binds