What is the Role of CTD in the following processes? Promoter scape mRNA CAPPING Elongation/splicing Termination...
Which of the following mRNA processing factors associates with the CTD of RNA polymerase II? A. Splicing factors B. Polyadenylation factors C. Capping proteins D. siRNAs
6. Describe the processes that give rise to mature mRNA (capping and splicing)
QUESTION 1 Which of the following statements regarding splicing is FALSE? A) The length of introns determines the efficiency of splicing. B) Many human neurological disorders are caused by splicing errors and/or mutations in splicing factors. C) Splicing requires the action of a variety of snRNAs that direct the transesterification reactions. D) Splicing is dictated by sequence features in pre-mRNA transcripts QUESTION 2 Which of the following mRNA processing factors does NOT associate with...
1. A loss of 3′ polyadenylation will lead to: a. intensified splicing of mRNA. b. intensified capping. c. decreased stability of the mRNA. d. intensified splicing of tRNA. e. alternative splicing. 2. What is the function of helicase? a. It eliminates supercoils by cleaving DNA. b. It utilizes the energy of ATP to add negative supercoils to DNA. c. It removes mismatched nucleotides from the 3′ end of DNA. d. It utilizes the energy of ATP for separation of strands....
10. Describe what is meant by a) RNA capping and b) Polyadenylation . 11. Describe the process of RNA splicing. Please include what the role of the spliceosome, snRNAs and alternative splicing. 12. A prokaryotic RNA may contain many AUG codons. How does the ribosome distinguish AUG codons specifying initiation from AUG codons specifying internal methionine? 13. How does each tRNA molecule recognize the one amino acid in 20 that is its proper partner? Please explain and include in your...
What steps of transcription (initiation, elongation, termination) might be affected by a DNA mutation in the template strand upstream of the promoter sequence? What about downstream?
1. What is the significance of transcription and translation in overall physiology of Human or bacterial cells? 2. What is transcription? 3. What is translation? 4. What are the differences between Transcription and replication 5. What're the differences between the Transcription and Translation process in human cells versus bacterial cells? 6. What are the functions of RNA polymeraseI, Il and 1lI? 7. What is a promoter and what are the important sequences within a promoter? 8. What is the role...
What is the function of the 3' poly-A sequence in eukaryotic mRNA? Select one: O a. Intron splicing signal. O b. Initial attachment site for ribosomes. O c. Translation termination. O d. Protection from cytosolic enzymes. What is the function of the 5' cap in eukaryotic mRNA? Select one: O a. Polyadenylation of the 5' end of the mRNA. b. Intron splicing signal. O c. It must be on the mRNA in order for the mature mRNA to be exported...
The termination of synthesis of the polycistronic mRNA is Rho dependent. The role of the Rho proteins is which of the following? A. To induce the formation of a hairpin loop in the mRNA B. To induce the formation of a hairpin loop in the DNA template C. To weigh down the mRNA, pulling it off the DNA template D. To unwind the DNA-RNA hybrid, releasing the RNA from the template E. To knock the polymerase off of the DNA...
QUESTION 6 During which stage of eukaryotic transcription do the following processes take place? 1. RNA polymerase ll binds to the promoter 2. The RNA transcript released 3. The RNA transcript extended a. 1-termination; 2-initiation; 3-elongation b. 1-nitiation, 2-elongation; 3-termination c. 1-elongation; 2-termination; 3-initiation d. 1-initiation; 2-termination; 3-elongation e. 1-termination; 2-elongation; 3-initiation