9. True or False Circle the correct choice More than 90% of the DNA is NOT transcribed into mRNA. 10. The region within the 5' UTR where transcription factor assemble prior to transcription is typically known as the __ 11. Which of the following RNA polymerases is responsible for transcribing mRNAs? a. Polymerase I b. Polymerase II C. Polymerase III d. Polymerase alpha __ 12. TFIID __ 13. TFIIH __ 14. Topoisomerase __ 15. TFIIB A. a kinase B. Creates space for RNA polymerase to bind. C. works downstream of the transcription bubble to untangle the DNA D. Is the first TF to assemble at the promoter

9. True or False: Circle the correct choice. More than 90% of the DNA is NOT transcribed into mRNA.<br /><br />Answer: True.<br /><br />Explanation: Not all regions of DNA are transcribed into mRNA. Only specific regions, known as genes, are transcribed. The majority of DNA consists of non-coding regions that do not get transcribed into mRNA.<br /><br />10. The region within the 5' UTR where transcription factors assemble prior to transcription is typically known as the __<br /><br />Answer: promoter region.<br /><br />Explanation: The promoter region is a specific sequence of DNA located upstream of the transcription start site. It serves as a binding site for transcription factors and other proteins that initiate the process of transcription.<br /><br />11. Which of the following RNA polymerases is responsible for transcribing mRNAs?<br /><br />Answer: b. Polymerase II<br /><br />Explanation: RNA polymerase II is responsible for transcribing mRNA in eukaryotic cells. It recognizes specific DNA sequences and initiates the synthesis of mRNA molecules.<br /><br />12. TFIID<br /><br />Answer: D. Is the first TF to assemble at the promoter<br /><br />Explanation: TFIID is a transcription factor that recognizes and binds to the TATA box, a specific DNA sequence found in the promoter region of many genes. It is the first transcription factor to assemble at the promoter and plays a crucial role in initiating transcription.<br /><br />13. TFIIH<br /><br />Answer: A. a kinase<br /><br />Explanation: TFIIH is a transcription factor that contains helicase and kinase activities. It helps to unwind the DNA double helix and phosphorylates the C-terminal domain of RNA polymerase II, which is essential for the initiation of transcription.<br /><br />14. Topoisomerase<br /><br />Answer: C. works downstream of the transcription bubble to untangle the DNA<br /><br />Explanation: Topoisomerase is an enzyme that helps to relieve the tension and tangles that can occur during the process of transcription. It works downstream of the transcription bubble to untangle the DNA and prevent supercoiling.<br /><br />15. TFIIB<br /><br />Answer: B. Creates space for RNA polymerase to bind.<br /><br />Explanation: TFIIB is a transcription factor that helps to position RNA polymerase at the start site of transcription. It creates space for RNA polymerase to bind to the DNA and initiate the synthesis of mRNA.