Which post-transcriptional modification is NOT shared by all eukaryotic RNAs? a. Modifying bases b. Removing RNA stretches c. Adding of terminal sequences d. all of the above
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- What is an example of a post translational modification? a. Poly (a) tail b. 5' capping c. Removal of introns d. All of the aboveOf the following, which is a modification made to the pre-mRNA of eukaryotes before translation? a. The 5’ end receives a poly-A tail b. All of the above c. The 3’ end receives a cap d. Introns are cut out and exons are spliced togetherWhich of the following is a function of the 7-methylguanosine cap? a. Exit of mRNA from the nucleus b. Efficient splicing of pre-mRNA c. Initiation of translation d. All of the above
- Which pre-mRNA processing step is important for initiating translation? a. poly-A tail b. RNA editing c. splicing d. 7-methylguanosine capThe stage of transcription where mRNA is synthesized is called (a) initiation (b) elongation (c) termination (d) post transcriptional modification (e) none of the abovePortions of eukaryotic mRNA sequence that are removed during RNA processing are . a. exons b. caps c. poly-A tails d. introns
- _______ are removed from new mRNAs. a. Introns c. Poly-A tails b. Exons d. Amino acidsWhich of the following is/are typically removed from pre-mRNA during nuclear processing in eukaryotes? (a) upstream leader sequences (b) poly-A tail (c) introns (d) exons (e) all the precedingDuring translation, ____________ is the step in which new t-RNA is attracted to the ribosome (a) the formation of the open promoter complex (b) codon recognition (c) peptide bond formation (d) translocation (e) none of the above
- Which of the following statements best describes the promoter of a protein-coding gene? A. The promoter is a protein that recruits RNA polymerase. B. The promoter is part of the RNA molecule itself. C. The promoter is a site found on RNA polymerase. D. The promoter contains the AUG start codon. E. The promoter is a nontranscribed region of a gene.Which of the following statements about RNA processing in eukaryotes is INCORRECT? A. The excision of introns from pre-mRNA is the only modification required to produce a mature mRNA. B. A protein/RNA complex is used to remove introns from the pre-mRNA. C. A poly A tail is added on to the 3′ end of the mRNA. D. A 7-methylguanosine cap is added on to the 5′end of the mRNA. E. Modification occurs in the nucleus.During Codon recognition (a) the ribosome moves towards the 3’ end of the mRNA (b) a tautomeric shift occurs (c) a peptide bond forms (d) anticodon and codon pairing occurs (e) all of the above
