Nucleic Acids - Mock Test 15

Question 141

What is the subcellular site for the biosynthesis of proteins?

A) Chromosomes B) Lymosomes C) Ribosomes D) Centrosomes

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Question 142

ATP is required for?

A) Fusion of 40S and 60S of ribosome B) Accommodation tRNA amino acid in a site of ribosome C) Movement of ribosome along mRNA D) formation of tRNA amino acid complex

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Question 143

The antibiotic which has a structure similar to the amino acyl end of tRNA tyrosine is?

A) Actinomycin d B) Streptomycin C) Puromycin D) Mitomycin c

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Question 144

The antibiotic which cleaves DNA is?

A) Actinomycin d B) Streptomycin C) Puromycin D) Mitomycin C

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Question 145

The antibiotic which inhibits DNA dependent RNA polymerase is?

A) Mitomycin C B) Actinomycin d C) Streptomycin D) Puromycin

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Question 146

GTP is not required for?

A) Capping L of mRNA B) Fusion of 40S and 60S of ribosome C) Accommodation of tRNA amino acid D) Formation of tRNA amino acid complex

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Question 147

L-glutamic acid is subjected to oxidative deaminition by?

A) L-amino acid dehydrogenase B) L-glutamate dehydrogenase C) Glutaminase D) Glutamine synthetase

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Question 148

Which of these methyl donors is not a quanternary ammonium compound?

A) Methionine B) Choline C) Betain D) Betainaldehyde

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Question 149

Cancer cells may become resistant to amethopterin by?

A) Developing mechanisms to destroy amethopterin B) Amplification of dihydrofolate reducatse gene C) Mutation in the dihydrofolate reductase gene so that the enzyme is no longer inhibited by amethopterin D) Developing alternate pathway of thymidylate synthesis

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Question 150

RB 1 gene is?

A) A tumour suppressor gene B) Oncogene C) Proto-oncogene D) Activated proto-oncogene

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