Nucleic Acids - Mock Test 6

Question 51

Synthesis of RNA molecule is terminated by a signal which is recognised by?

A) α-factor B) β-factor C) δ-factor D) ρ

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Question 52

Which of the following is transcribed during repression?

A) Structural gene B) Promoter gene C) Regulator gene D) Operator gene

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Question 53

DNA ligase of E. coli requires which of the following co-factors?

A) FAD B) NAD+ C) NADP+ D) NADH

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Question 54

The normal function of restriction endonucleases is to?

A) Excise introns from hrRNA B) Polymerize nucleotides to form RNA C) Remove primer from okazaki fragments D) Protect bacteria from foreign DNA

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Question 55

Degeneracy of the genetic code denotes the existence of?

A) Base triplets that do not code for any amino acids B) Codons consisting of only two bases C) Codons that include one or more of the unusual bases D) Multiple codons for a single amino acid

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Question 56

In the ’lac operon’ concept, which of the following is a protein?

A) Operator B) Repressor C) Inducer D) Vector

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Question 57

Another name for reverse transcriptase is?

A) DNA dependent DNA polymerase B) DNA dependent RNA polymerase C) RNA dependent DNA polymerase D) RNA dependent RNA polymerase

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Question 58

The anticodon region is an important part of the structure of?

A) rRNA B) tRNA C) mRNA D) hrRNA

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Question 59

In the process of transcription, the flow of genetic information is from?

A) DNA to DNA B) DNA to protein C) RNA to protein D) DNA to RNA

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Question 60

Nonsense codons bring about?

A) Amino acid activation B) Initiation of protein synthesis C) Termination of protein synthesis D) Elongation of polypeptide chains

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