Question

How do transcription factors regulate gene expression?

Answer 1

There are two transcription factors. Sigma and rho. When the sigma factor gets attached to transcriptase enzyme at the promoter region of the gene, transcription starts and when the rho factor gets attached to the enzyme at the terminator region of the gene, transcription ends.

Answer 2

Answer:

Hey mate here is your answer,

Transcription factors include a wide number of proteins, excluding RNA polymerase.Sigma and rho are the Transcription factors. If once Sigma gets attached to promoter region and when rho attached to terminator region,then the transcription end.