Homework Answers
Answer 6-
The mRNA is formed due to the process of transcription from DNA. Transcription is the process of formation of mRNA from a genetic sequence of DNA. But still there is need to process the mRNA to form mature mRNA. Maturation of mRNA involves the splicing and capping processes.
Splicing is the process in which the removal of extrons are added and introns are removed. Extrons are the coding sequence while the introns are the non coding sequence. Splicing is an important step in trancription of nucleus, without removal of introns nucleus cannot be transcript.
Capping is the covering of the ends of the mRNA which protect any further reaction with the mRNA and in the end it promotes the mRNA to begin the tanslation.
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6. Describe the processes that give rise to mature mRNA (capping and splicing)
What does the 5 prime cap on the mature mRNA consist of? (Choose all that apply)...
What does the 5 prime cap on the mature mRNA consist of? (Choose all that apply) cap proteins backwards, methylated G nucleotide polyA tail ribosome QUESTION 7 Which DNA regions are necessary to specify removal of an intron? (choose all that apply) cleavage site branch point 5' splice site 3' splice site U-rich sequence QUESTION 9 Which of the following can permit a single gene to produce several different proteins? (choose all that apply) multiple 5' capping sites alternative splicing...
1. A loss of 3′ polyadenylation will lead to: a. intensified splicing of mRNA. b. intensified...
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....
D. Alternative splicing allows for: o enhanced recognition of an mRNA by a ribosome. O different...
D. Alternative splicing allows for: o enhanced recognition of an mRNA by a ribosome. O different polypeptides to be made from a single gene. O multiple genes to be used to code for a single polypeptide chain. O increased stability of a mature mRNA.
10. Describe what is meant by a) RNA capping and b) Polyadenylation . 11. Describe the...
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...
QUESTION 1 Which of the following statements regarding splicing is FALSE? A) The length...
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...
Eukaryotic mRNAs can undergo alternative splicing.
Eukaryotic mRNAs can undergo alternative splicing. This is often used as a way to generate unique products in different cells of a multicellular organism. Let's assume that for a particular mRNA, exon 2 has normal 5' and 3' splice junctions, meaning that this exon will normally be recognized by the spliceosome for inclusion into the mature mRNA. Give me an explanation for how a different type of cell could block the inclusion of exon 2, so that it would not...
Describe the features present in a mature eukaryotic messenger RNA (mRNA) and discuss how they facilitate...
Describe the features present in a mature eukaryotic messenger RNA (mRNA) and discuss how they facilitate translation initiation
How do organizational processes give rise to potential failures?
How do organizational processes give rise to potential failures?
QUESTION 1 A segment of mature edited mRNA that correctly codes for a protein is as...
QUESTION 1 A segment of mature edited mRNA that correctly codes for a protein is as follows: 5-ACGUUCGCUUUAGCUAGCCA-3 . Match each of the pre-edited mRNA sequences with the correct editing mechanism. - 5'-ACGCGCAGCAGCCA-3' A. A-G conversion - 5'-AGUUGCUUUAGUAGA-3 B. C-U conversion - 5'-ACGCCCGCCCCAGCCAGCCA-3' C. C-Insertion - 5'-ACAUUCACUUUAGCUAACCA-3' D.U-Insertion QUESTION 2 3 po Match the term with its function. - - - A. Necessary for RNA export from the nucleus small nuclear RNA + protein complexes, involved in * intron removal...
Describe the three events that occur during pre-mRNA processing in eukaryotic cells, including where these processes...
Describe the three events that occur during pre-mRNA processing in eukaryotic cells, including where these processes take place within the cell.
What does the 5 prime cap on the mature mRNA consist of? (Choose all that apply) cap proteins backwards, methylated G nucleotide polyA tail ribosome QUESTION 7 Which DNA regions are necessary to specify removal of an intron? (choose all that apply) cleavage site branch point 5' splice site 3' splice site U-rich sequence QUESTION 9 Which of the following can permit a single gene to produce several different proteins? (choose all that apply) multiple 5' capping sites alternative splicing...
D. Alternative splicing allows for: o enhanced recognition of an mRNA by a ribosome. O different polypeptides to be made from a single gene. O multiple genes to be used to code for a single polypeptide chain. O increased stability of a mature mRNA.
QUESTION 1 A segment of mature edited mRNA that correctly codes for a protein is as follows: 5-ACGUUCGCUUUAGCUAGCCA-3 . Match each of the pre-edited mRNA sequences with the correct editing mechanism. - 5'-ACGCGCAGCAGCCA-3' A. A-G conversion - 5'-AGUUGCUUUAGUAGA-3 B. C-U conversion - 5'-ACGCCCGCCCCAGCCAGCCA-3' C. C-Insertion - 5'-ACAUUCACUUUAGCUAACCA-3' D.U-Insertion QUESTION 2 3 po Match the term with its function. - - - A. Necessary for RNA export from the nucleus small nuclear RNA + protein complexes, involved in * intron removal...
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