Homework Answers
Ans- during group II self-splicing the lariat formation is not dependent on the 3' OH. an intron is removed by a two successive transesterification reactions. the first reaction is triggered by a 2' OH group of the conserved A at the branch site. the 2' OH group act as a nucleophile, to attack the phosphoryl group of the conserved G at 5' splice site. this free 5' end is joined to the free 2' OH group of conserved A at branch sites and form a lariat.
so option C formation of the lariat intermediate is dependent on the 3' OH is false regarding RNA splicing.
in alternative splicing, splicing can remove coding as well as non-coding sequence.
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Question 3 Which of the following statements about RNA splicing is false? Small RNA molecules in...
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...
Which of the following statements about splicing is false? A. a single gene can code for...
Which of the following statements about splicing is false? A. a single gene can code for many types of protein due to alternative splicing B. The 5' and 3' regions of the intron are highly variable in sequence C. the spliceosome is found in the nucleus of the cell D. The mRNA is composed of exons; introns are spliced out
Which of the following is NOT a feature of RNA processing in eukaryotes? a. Caps and...
Which of the following is NOT a feature of RNA processing in eukaryotes? a. Caps and tails are added to RNA transcripts before they leave the nucleus b. Multiple genes are represented in one mRNA from an operon c. Introns are removed and exons are spliced back together to make mature mRNA d . "Alternative splicing" means that one gene in the genome can encode multiple products e. The sequence that codes for one eukaryotic gene is not a continuous...
QUESTION 2 Match the term with its function B. - 5'cap E poly-A tail D. SnRNP...
QUESTION 2 Match the term with its function B. - 5'cap E poly-A tail D. SnRNP A self-splicing intron B. Guides mRNA to ribosomes and protects it from exonuclease activity C. Structure in which introns are spliced out of hn RNA D. small nuclear RNA-protein complexes, involved in intron removal E. Necessary for RNA export from the nucleus A spliceosome C. group I intron
Question 8 1 pts Of the following protein synthesizing RNA molecules, which codes for a protein?...
Question 8 1 pts Of the following protein synthesizing RNA molecules, which codes for a protein? OrRNA mRNA TRNA OsiRNA Question 9 1 pts Prokaryotic mRNA is commonly processed through splicing by RNase enzymes. immediate translation during transcription. addition of 7-methylguanylate cap. O removal of exons.
Question 4) Trans-splicing is a special form of RNA splicing that occurs in 70-80% of all...
Question 4) Trans-splicing is a special form of RNA splicing that occurs in 70-80% of all genes in the soil nematode C. elegans. In trans-splicing, the exons from two different primary RNA transcripts produced in different portions of the genome are joined end-to-end and ligated. Do you consider these trans-spliced sequences of real genes or are they instead the product of a fusion of two genes? Question 5) Recently researchers discovered a new class of mRNA regulators named miRNAs. miRNAs...
Question 4) Trans-splicing is a special form of RNA splicing that occurs in 70-80% of all...
Question 4) Trans-splicing is a special form of RNA splicing that occurs in 70-80% of all genes in the soil nematode C. elegans. In trans-splicing, the exons from two different primary RNA transcripts produced in different portions of the genome are joined end-to-end and ligated. Do you consider these trans-spliced sequences of real genes or are they instead the product of a fusion of two genes? Question 5) Recently researchers discovered a new class of mRNA regulators named miRNAs. miRNAs...
QUESTION 1 RNA poll initiates synthesis of the mRNA transcript without a primer True O False...
QUESTION 1 RNA poll initiates synthesis of the mRNA transcript without a primer True O False QUESTION 2 En The +1 position identifies the location for translation to begin when bound the mRNA is bound by the ribosomal subunit. True False QUESTION 3 The small ribosomal subunit binds the mRNA transcript at a sequence that is complementary to the gene promoter in order to initiate translation. O True False QUESTION 4 The 5' cap is necessary for protection from exonuclease...
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...
QUESTION 15 RNA modification involves: O A. splicing B. 3' poly A tailing O C. 5'...
QUESTION 15 RNA modification involves: O A. splicing B. 3' poly A tailing O C. 5' capping O D. all of the above QUESTION 16 What is the contribution or purpose of 5' capping? o It helps the mRNA exit the nucleus. o promotes efficient splicing. o It helps in the initiation of translation o all of the above QUESTION 17 What is translation? O process of making RNA O process of making DNA O process of making protein O...
QUESTION 2 Match the term with its function B. - 5'cap E poly-A tail D. SnRNP A self-splicing intron B. Guides mRNA to ribosomes and protects it from exonuclease activity C. Structure in which introns are spliced out of hn RNA D. small nuclear RNA-protein complexes, involved in intron removal E. Necessary for RNA export from the nucleus A spliceosome C. group I intron
Question 8 1 pts Of the following protein synthesizing RNA molecules, which codes for a protein? OrRNA mRNA TRNA OsiRNA Question 9 1 pts Prokaryotic mRNA is commonly processed through splicing by RNase enzymes. immediate translation during transcription. addition of 7-methylguanylate cap. O removal of exons.
Question 4) Trans-splicing is a special form of RNA splicing that occurs in 70-80% of all genes in the soil nematode C. elegans. In trans-splicing, the exons from two different primary RNA transcripts produced in different portions of the genome are joined end-to-end and ligated. Do you consider these trans-spliced sequences of real genes or are they instead the product of a fusion of two genes? Question 5) Recently researchers discovered a new class of mRNA regulators named miRNAs. miRNAs...
Question 4) Trans-splicing is a special form of RNA splicing that occurs in 70-80% of all genes in the soil nematode C. elegans. In trans-splicing, the exons from two different primary RNA transcripts produced in different portions of the genome are joined end-to-end and ligated. Do you consider these trans-spliced sequences of real genes or are they instead the product of a fusion of two genes? Question 5) Recently researchers discovered a new class of mRNA regulators named miRNAs. miRNAs...
QUESTION 1 RNA poll initiates synthesis of the mRNA transcript without a primer True O False QUESTION 2 En The +1 position identifies the location for translation to begin when bound the mRNA is bound by the ribosomal subunit. True False QUESTION 3 The small ribosomal subunit binds the mRNA transcript at a sequence that is complementary to the gene promoter in order to initiate translation. O True False QUESTION 4 The 5' cap is necessary for protection from exonuclease...
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...
QUESTION 15 RNA modification involves: O A. splicing B. 3' poly A tailing O C. 5' capping O D. all of the above QUESTION 16 What is the contribution or purpose of 5' capping? o It helps the mRNA exit the nucleus. o promotes efficient splicing. o It helps in the initiation of translation o all of the above QUESTION 17 What is translation? O process of making RNA O process of making DNA O process of making protein O...
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