Molecular Basis of Inheritance MCQ Questions & Answers in Botany

51. The number of base substitution possible in amino acid codons is

A 261

B 264

C 535

D 549

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52. The transfer RNA molecule in $$3D$$ appears

A $$L$$-shaped

B $$E$$-shaped

C $$Y$$-shaped

D $$S$$-shaped

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53. Select the two correct statements out of the four (a–d) given below about lac operon.
(i) Glucose or galactose may bind with the repressor and inactivate it
(ii) In the absence of lactose the repressor binds with the operator region
(iii) The $$z$$-gene codes for permease
(iv) This was elucidated by Francois Jacob and Jacque Monod
The correct statements are:

A (ii) and (iii)

B (i) and (iii)

C (ii) and (iv)

D (i) and (ii)

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54. What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA?

A A polypeptide of 25 amino acids will be formed

B A polypeptide of 24 amino acids will be formed

C Two polypeptides of 24 and 25 amino acids will be formed

D A polypeptide of 49 amino acids will be formed

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55. The association of histone $${H_1}$$ with a nucleosome indicates:

A DNA replication is occurring

B The DNA is condensed into a Chromatin Fibre

C The DNA double helix is exposed

D Transcription is occurring

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56. The translation termination triplet is

A UAU

B UAA

C UAC

D UGC

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57. Okazaki fragments are seen during

A transcription

B translation

C replication

D transduction

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58. Transformation experiment was first performed on which bacteria?

A E.coli

B Diplococcus pneumoniae

C Salmonella

D Pasteurella pestis

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59. In history of biology, human genome project led to the development of :

A biotechnology

B biomonitoring

C bioinformatics

D biosystematics

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60. In the genetic dictionary, there are 64 codons as

A 64 amino acids are to be coded

B 64 types of tRNAs are present

C there are 44 nonsense codons and 20 sense codons

D genetic code is triplet

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51. The number of base substitution possible in amino acid codons is

52. The transfer RNA molecule in $$3D$$ appears

54. What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA?

55. The association of histone $${H_1}$$ with a nucleosome indicates:

56. The translation termination triplet is

57. Okazaki fragments are seen during

58. Transformation experiment was first performed on which bacteria?

59. In history of biology, human genome project led to the development of :

60. In the genetic dictionary, there are 64 codons as

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