Molecular Basis of Inheritance MCQ Questions & Answers in Botany

71. Which one of the following is wrongly matched?

A Transcription - Writing information from DNA to tRNA

B Translation - Using information in mRNA to make protein

C Repressor protein - Binds to operator to stop enzyme synthesis

D Operon - Structural genes, operator and promoter

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72. What initiation and termination factors are involved in transcription in Eukaryotes?

A $$\alpha $$ and $$\sigma $$, respectively

B $$\sigma $$ and $$\rho $$, respectively

C $$\alpha $$ and $$\beta $$, respectively

D $$\beta $$ and $$\gamma $$, respectively

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73. Anticodon is an unpaired triplet of bases in an exposed position of

A mRNA

B rRNA

C tRNA

D sRNA

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74. Genes that are involved in turning on or off the transcription of a set of structural genes are called

A Operator genes

B Redundant genes

C Regulator genes

D Polymorphic genes

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75. During development of an organism, the product of one gene is required to activate another gene. Such gene products are called

A transcription factors

B episomes

C coenzymes

D catalase

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76. In split genes, the coding sequences are called

A introns

B operons

C exons

D cistrons

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77. A mutation at one base of the first codon, of a gene, produces a non-functional protein. Such a mutation is called

A nonsense mutation

B missense mutation

C frameshift mutation

D reverse mutation

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78. Removal of introns and joining of exons in a defined order during transcription is called :

A Looping

B Inducing

C Slicing

D Splicing

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79. Which is not involved in protein synthesis ?

A Transcription

B Initition

C Elongation

D Termination

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80. Initiation codon of protein synthesis (in eucaryotes) is

A GUA

B GCA

C CCA

D AUG

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71. Which one of the following is wrongly matched?

72. What initiation and termination factors are involved in transcription in Eukaryotes?

73. Anticodon is an unpaired triplet of bases in an exposed position of

74. Genes that are involved in turning on or off the transcription of a set of structural genes are called

75. During development of an organism, the product of one gene is required to activate another gene. Such gene products are called

76. In split genes, the coding sequences are called

77. A mutation at one base of the first codon, of a gene, produces a non-functional protein. Such a mutation is called

78. Removal of introns and joining of exons in a defined order during transcription is called :

79. Which is not involved in protein synthesis ?

80. Initiation codon of protein synthesis (in eucaryotes) is

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