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1、生物化学练习题RNA的转录（Biochemistry exercise - the transcription of RNA）Biochemical practice problems - transcription of RNA (single topic selection)1. The description of RNA polymerase is incorrectA. Consists of core enzyme and sigma factorB. The core enzyme consists of alpha 2 beta betaC. The difference be
2、tween the whole enzyme and the core enzyme lies in the presence of the beta subunitD. total enzymes include sigma factorE. sigma factor is only related to transcription starting2. The process of synthesizing DNA with RNA isA.D NAs full retention replication mechanismThe semi-retained replication mec
3、hanism of b. d NAThe half discontinuous replication of c.d. NAThe total discontinuous replication of d.d. NAE. Reverse transcription3. The enzyme that catalyzes the synthesis of the first strand of cDNA is a template of RNAA. reverse transcriptaseB. telomeraseC. terminal transferaseD. RetrovirusE. p
4、hage virus4. The misstatement about the reverse transcriptase is falseA. the action is four dNTPB. catalyze the reaction of RNA to hydrolysisC. Synthesis direction 3 - 5D. Catalyzed DNA synthesis by RNAE. Can form the intermediate product of DNA - RNA hybridization5. In DNA biosynthesis, DNA polymer
5、ization reactions with catalytic RNA guidance, RNA hydrolysis and dna-directed DNA polymerization are the enzymes of the three functionsA. d. NA polymeraseB.R NA polymeraseC. Reverse transcriptaseD.D NA hydrolaseE. ligase6. In eukaryotic cells, RNA polymerase catalytic is the product of transcriptio
6、nA.h nRNAB.t RNAC. RNAD.U 4, U5snRNAE. 5.8 S, 18S, 28SrRNA precursor7. The product of RNA polymerase I catalytic transcription in eukaryotic cells isA.h nRNAB.t RNAC. 5 srrnaD.U 4, U5snRNAE. 5.8 S, 18S, 28SrRNA precursors8. The enzyme needed during transcription isA.D NA directed DNA polymeraseB. nu
7、cleaseC.R guide RNA polymerase NAD.d. NA guided RNA polymeraseThe DNA polymerase directed by E.R NA9. The following statement about rRNA is incorrectA. prokaryotic rRNA is catalyzed by RNA polymeraseB. eukaryotic ribosomal RNA transcription by RNA polymerase synthesisAfter transcription of the c.r.
8、RNA, methylation is requiredD. RRNA genes in chromosome DNA are multicopyE.rrna accounts for 80 to 85 percent of the total RNA in the cell10. The following statement of sigma factor is correctA. participate in identifying the special starting points for transcription RNA on DNA templatesB. participa
9、te in identifying the termination signals on the DNA templateC. Bidirectional polymerization of catalytic RNA chainsD. Is an organic compound of small moleculesE. Participate in reverse transcription11. The enzyme that catalyzes the transcription of eukaryotic mrnas isA.R NA polymerase IB.M tRNA pol
10、ymeraseC.R NA polymerase D.R NA replicaseE.R NA polymerase 12. The enzyme that catalyzes the transcription of prokaryotic mrnas isA.R NA replicaseB.R NA polymeraseC.D NA polymeraseD.R NA polymerase E.R NA polymerase I13. The enzyme that catalyzes eukaryotic tRNA transcription isA.R NA polymerase IB.
11、D NA polymeraseC.R NA polymerase D.R NA replicaseE. None of the above14. Eukaryotic RNA polymerase within the nucleus is the product of transcriptionA.h nRNAB. mitochondrial RNAsC.U 6snRNA precursor, 5SrRNA precursorsD. 5.8 S, 28SrRNA precursorsE.S cRNAThe subgroup that promotes the formation of die
12、ster in RNA polymerase isA. Prokaryotic RNA polymerase subgroup deltaB. The prokaryotic RNA polymerase, alpha-alphaC.The prokaryotic RNA polymerase subunit betaD. Prokaryotic RNA polymerase subunit betaE. Prokaryotic RNA polymerase subgroup sigmaThe subgroup of the RNA polymerase that recognizes tem
13、plate transcription startsA. Prokaryotic RNA polymerase subgroup deltaB. The prokaryotic RNA polymerase, alpha-alphaC. Prokaryotic RNA polymerase subunit betaD. Prokaryotic RNA polymerase subunit betaE. Prokaryotic RNA polymerase subgroup sigma17. Which of the following statements about the role of
14、reverse transcriptase is wrong?A. DNA is synthesized from RNAB. Need a primer with 3 -ohC. The extension of the catalytic chain, its direction is 3 , 5 D. The substrate is four dNTPE. Requires Mg2 + or Mn2 +18. The sequence of a base sequence of DNA is 5 ACTAGTCAG3, and the corresponding base sequen
15、ce of the post-transcriptional mRNA isA. 5 - TGATCAGTC - 3B. 5 - UGAUCAGUC - 3C. 5 - CUGACUAGU - 3D. 5 - CTGACTAGT - 3E. 5 - CAGCUGACU - 319. There is a piece of DNA that has a sequence of 3 . ATTCAG. 5 , the transcription goes from left to right, and the order of RNA that is generated should beA. 5 . GACUUA.
