Which of the following is/are true concerning TAFs and TBP?
A)They are subunits of TFIIB and TFIID,respectively.
B)TBP is required to initiate transcription of class I and class III genes.
C)They are not associated with RNA polymerase I and RNA polymerase III.
D)All of the above.

Question

Quizplus · Accepted Answer

TAFs (TBP-associated factors) are subunits of TFIID, while TBP (TATA-binding protein) is a subunit of TFIIA. TBP is required to initiate transcription of class II genes, not class I and class III genes. TAFs and TBP are both associated with RNA polymerase II, but not RNA polymerase I and III. Therefore, option B is the only true statement.

Which of the Following Is/are True Concerning TAFs and TBP