Question

Regulatory transcription factors that prevent transcription from occurring are called __________.

a) Activators
b) Suppressors
c) Enhancers
d) Repressors

Answer 1

Repressors are regulatory transcription factors that prevent transcription from occurring by binding to a DNA sequence within the regulatory region called the operator, thus blocking RNA polymerase from transcribing structural genes and suppressing gene expression.

Step-by-step explanation:

Regulatory transcription factors that prevent transcription from occurring are called Repressors. Repressors are a type of transcription factor that bind to a DNA sequence within the regulatory region called the operator, blocking RNA polymerase from transcribing structural genes and thus suppressing gene expression.