Question

TFIIH, responsible for forming the transcription bubble, is best described as a _____.

a) Transcription elongation factor
b) Transcription initiation factor
c) Helicase
d) Topoisomerase

Answer 1

TFIIH is a transcription initiation factor that helps form the transcription bubble by unwinding DNA to allow mRNA synthesis.

Step-by-step explanation:

TFIIH, responsible for forming the transcription bubble, is best described as a transcription initiation factor. This complex plays a pivotal role during the initiation phase of transcription, where it contributes to the recruitment of RNA polymerase II to a protein coding gene. The transcription initiation factor is involved in unwinding the DNA double helix at the initiation site, allowing RNA polymerase to synthesize mRNA.