5 Questions
What is the main function of RNA polymerases in transcription?
Producing RNA complementary to one strand of DNA
Which type of transcription factors are required for transcription initiation in eukaryotes?
General transcription factors and gene-specific transcription factors
What is the function of TFIID in transcription initiation by RNA polymerase II?
Recognition of TATA box
How many subunits does RNA polymerase II consist of?
12
What is the outcome of transcription?
RNA molecules complementary to one strand of DNA
Study Notes
Transcription
- The main function of RNA polymerases is to synthesize an RNA molecule from a DNA template during transcription.
- In eukaryotes, transcription initiation by RNA polymerase II requires the presence of general transcription factors, which are essential for recruiting RNA polymerase II to the promoter region.
- TFIID (Transcription Factor II D) plays a crucial role in transcription initiation by RNA polymerase II, as it recognizes and binds to the TATA box, a specific DNA sequence in the promoter region, and recruits other transcription factors to form the pre-initiation complex.
- RNA polymerase II, the primary enzyme responsible for transcribing mRNA, consists of 12 subunits.
- The outcome of transcription is the synthesis of a complementary RNA molecule from a DNA template, which is then used as a template for protein synthesis or other cellular processes.
Test your knowledge of gene expression regulation with this quiz covering lectures 8 to 14. Explore transcription, RNA processing, and the steps from DNA to RNA to protein. Ideal for biology students and enthusiasts.
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