40.A possible mistake in replication is18.Where is the anticodon located?a permanent DNA-altering mutation.mispairing between a new nucleotide and a templatenucleotide.On MRNAa.a.b.b.On the rRNA.C.On the TRNA.strand slippage that leads to a deletion.strand slippage that creates an addition.All of these.On the snRNA.On the miRNA.c.d.d.e.е.e.19-During elongation, the tRNA leave from41.Who determined that DNA is helical?a.the A site.a.Levene.b.the P site.b.Meselson and Stahl.the E site.the assembly point.C.Hershey and Chase.d.c.d.Franklin.e.the peptide loOD.е.е.Watson and Crick.A mutagen is something that50.42.After replicationcan swap DNA segments between chromosomes.increases the rate of changes to the DNA sequence.an excision of combined thymines.changes the reading frame of a chromosome.a.b.Okazaki fragments are formed.b.helicase unwinds the DNA.a.c.d.mismatched pairs are corrected.DNA molecules separate.c.d.e.All of these.oxvgen is removed from ribose.e.Unlike the trp operon, the lac operon is51.43.After termination there are twoa transposon.an excision repair.inversible.repressible.inducible.a.b.completed DNA strands.excised errors.a.b.C.d.telomeres.plasmid copies.C.d.e.e.an area of replication on DNA.52.The process of making many identical copies of a gene is called44.Centrifugation separates material bytransformation tracking.replication.duplication.plasmid production.gene cloning.a.b.charge.b.a.density.electronegativity.All of these.C.C.c.d.d.е.e.None of these.53.The lacz gene45.Jacob and Monod hypothesized the existence ofa.turns bacteria blue when the enzyme acts on thea.ribosomal RNA.nutrient medium.b.transposons.b.breaks down galactose.retroviruses.c.is a selectable marker.c.d.messenger RNA.is often interrupted by a restrictionendonuclease.d.sticky ends.e.All of these.e.46.Which of these codons does NOT code for start or stop?54.In PCR, DNA is altered to form single strands when the temperature isa.UAGUGA55°C.65°C.b.a.c.UGb.72°C.95°C.d.AUGC.e.UAAd.e.100°C.47-What is the role of tRNA?55.A key to the success of PCR is the type of DNA polymerase that comesa.involved in modification of MRNA molecules.fromb.the template of translation.a bacteriophage retrovirus.Neurospora crassa.c.involved in the translation of MRNA.a.d.involved in regulating gene expression.b.expression vector.a strain of E. coll.a heat-loving bacterium.е.an enzyme combined with RNA.C.d.e.

Name: 40.A possible mistake in replication is18.Where is the anticodon loca
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Description: 40.A possible mistake in replication is18.Where is the anticodon located?a permanent DNA-altering mutation.mispairing between a new nucleotide and a templatenucleotide.On MRNAa.a.b.b.On the rRNA.C.On the TRNA.strand slippage that leads to a deletion

41= Levene was first biochemist who identified the chemical nature of DNA . Meselson and stahl…

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40. A possible mistake in replication is 18. Where is the anticodon located? a permanent DNA-altering mutation. mispairing between a new nucleotide and a template nucleotide. On MRNA On the FRNA. On the TRNA. On the snRNA. On the miRNA. a. a. b. b. c. strand slippage that leads to a deletion. d. strand slippage that creates an addition. All of these. C. d. e. e. 19. During elongation, the RNA leave from Who determined that DNA is helical? 41. a. the A site. a. Levene. b. the P site. b. Meselson and Stahl. C. d. the assembly point. the E site. C. Hershey and Chase. d. Franklin. e. the Deptide lood. e. Watson and Crick. A mutagen is something that 50. 42. After replication can swap DNA segments between chromosomes. a. b. increases the rate of changes to the DNA sequence. Okazaki fragments are formed. b. helicase unwinds the DNA. a. . an excision of combined thymines. C. mismatched pairs are corrected. d. changes the reading frame of a chromosome. d. DNA molecules separate. e. All of these. e. oxveen is removed from ribose. 51. Unlike the trp operon, the lac operon is 43. After termination there are two a transposon. an excision repair. inversible. repressible. a. completed DNA strands. b. a. b. excised errors. C. d. c. d. plasmid copies. an area of replication on DNA. telomeres. е. inducible. e. 52. The process of making many identical copies of a gene is called 44. Centrifugation separates material by a. transformation tracking. b. replication. charge. a. b. density. duplication. d. plasmid production. gene cloning. C. electronegativity. d. All of these. C. e. e. None of these. 53. The lacz gene 45- Jacob and Monod hypothesized the existence of a. turns bacteria blue when the enzyme acts on the a. ribosomal RNA. nutrient medium. b. transposons. breaks down galactose. is a selectable marker. is often interrupted by a restriction b. C. retroviruses. C. d. messenger RNA. sticky ends. d. e. endonuclease. e. All of these. 46. Which of these codons does NOT code for start or stop? In PCR, DNA is altered to form single strands when the tempera 54- a. UAG %3D 55°C. b. 65°C. C. 72°C. d. 95°C. b. UGA a. C. UG d. AUG e. UAA e. 100°c. 47. What is the role of TRNA? 55. A key to the success of PCR is the type of DNA polymerase that from a. involved in modification of mRNA molecules. b. the template of translation. C. involved in regulating gene expression. involved in the translation of MRNA. a bacteriophage retrovirus. Neurospora crassa. expression vector. a. d. b. e. an enzyme combined with RNA. C. d. a strain of E. coll.