Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein ?

Options

A. They only increase expression.
B. They only decrease expression.
C. They interact with RNA polymerase, but do not affect the expression.
D. They can act both as activators and as repressors.

Answer

D

Explanation

Regulatory proteins, the accesso ry proteins that interact with RNA polymerase and affect its role in transcription. It controls the functions of structural genes and are called. regulatory genes Promoters, terminators, operators and repressor are some important regulatory genes. They can act both as activators and as repressors