Many transcriptional activators are proteins with a DNA-binding domain (DBD) and an activation domain (AD). Explain how each domain contributes to transcriptional initiation. Would you expect repressors to also have each of these domains?

Video transcript

Hey everyone. Let's take a look at this question together. Except for the blank transcription factors include a large number of proteins that initiate and control gene transcription. So let's recall what we know about transcription factors to figure out which of the following is not one of them. So we know that transcription factors are routines containing a D. N. A binding domain and and activation domain and that they initiate and regulate transcription. And so looking at our answer choices, we C. S. R. Y protein, RNA polymerase and P 53 which we know that only one of these is not one of those transcription factors and it is answer choice B. RNA polymerase. Because both S. RY protein and P 53 are transcription factors and RNA polymerase is where the transcription factor finds too in order to help initiate and regulate transcription. And it is not one of those special proteins known as a transcription factor. So answer choice B is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.