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Keys to quiz 2 Part 1: Describe the following 10 terms (3 points each). (D)EF-G a. its structure likes tRNA b. it is a translational elongation factor c. it binds to ribosome when associated with GtP d. GTP hydrolysis allows it to reach into the small subunit e. the previous step triggers translocation of the A-site tRNA (A full point is given if you wrote three out of five points listed above (2)SsrA a. a tmrNa that is partly tRNa and partly mrna b. it rescues ribosomes stalled by prematurely terminated mRNA c. the rescue concerns ef-Tu-GTP d. Ssra binding adds a ten-amino-acid tag that is recognized by cellular (A full point is given if you wrote three out of four points listed above) (3)frameshift mutations a. caused by insertions or deletions of one or a few base pairs (1) b. the above change alters the reading frame of a protein (2) (4) gRNA a. it stands for guide RNA b. it directs Uridine insertions or deletions c. involved in the process of RNA editing deved into 3 regions: 5' anchor, editing region, and poly U (A full point is given if you wrote three out of four points listed above) (5)ADAR a. it stands for Adenosine Deaminase Acting on RNA(1 b. it converts Adenosine into Inosine through a process of site-specific eamination(2) (6 )RRF refers to ribosome recycling factor, a factor serves in the termination of translation in prokaryotic cells(1). RRF cooperates with EF-G and IF3 to recycle ribosomes after polypeptide release(1).It binds to the empty a site of the ribosome where it mimics a tRNA(1) (7)U2 snRNP is one of the five small nuclear ribonuclear proteins, a component of the spliceosome(1). After the formation of Early complex, U2 snRNP binds to the branch site, aided by U2AF and displacing BBP(1 ). This arrangement results in the extruded branch site A residue, which is unpaired and available to react with the 5Keys to quiz 2 Part I: Describe the following 10 terms (3 points each). (1) EF-G: a. its structure likes tRNA b. it is a translational elongation factor c. it binds to ribosome when associated with GTP d. GTP hydrolysis allows it to reach into the small subunit e. the previous step triggers translocation of the A-site tRNA (A full point is given if you wrote three out of five points listed above) (2) SsrA: a. a tmRNA that is partly tRNA and partly mRNA b. it rescues ribosomes stalled by prematurely terminated mRNA c. the rescue concerns EF-Tu-GTP d. SsrA binding adds a ten-amino-acid tag that is recognized by cellular proteases (A full point is given if you wrote three out of four points listed above) (3) frameshift mutations: a. caused by insertions or deletions of one or a few base pairs (1’) b. the above change alters the reading frame of a protein (2’) (4) gRNA: a. it stands for guide RNA b. it directs Uridine insertions or deletions c. involved in the process of RNA editing d. deved into 3 regions: 5' anchor, editing region, and poly U (A full point is given if you wrote three out of four points listed above) (5) ADAR: a. it stands for Adenosine Deaminase Acting on RNA (1’) b. it converts Adenosine into Inosine through a process of site-specific deamination (2’) (6) RRF refers to ribosome recycling factor, a factor serves in the termination of translation in prokaryotic cells (1’). RRF cooperates with EF-G and IF3 to recycle ribosomes after polypeptide release (1’). It binds to the empty A site of the ribosome, where it mimics a tRNA (1’). (7) U2 snRNP is one of the five small nuclear ribonuclear proteins, a component of the spliceosome (1’). After the formation of Early complex, U2 snRNP binds to the branch site, aided by U2AF and displacing BBP (1’). This arrangement results in the extruded branch site A residue, which is unpaired and available to react with the 5’
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