Nucleic Acids - Mock Test 34

Question 331

Newly synthesized tRNA undergoes posttranscriptional modifications which include all the following except?

A) Reduction in size B) Methylation of some bases C) Formation of pseudouridine D) Addition of C-C-A terminus at 5’ end

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Question 332

Post-transcriptional modification of hnRNA involves all of the following except?

A) Addition of 7-methylguanosine triphosphate cap B) Addition of polyadenylate tail C) Insertion of nucleotides D) Deletion of introns

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Question 333

Heterogeneous nuclear RNA is the precursor of?

A) mRNA B) rRNA C) tRNA D) None of these

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Question 334

In mammals, synthesis of mRNA is catalysed by?

A) RNA polymerase I B) RNA polymerase II C) RNA polymerase III D) RNA polymerase IV

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Question 335

Mammalian RNA polymerase III synthesises?

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

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Question 336

Mammalian RNA polymerase I synthesises?

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

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Question 337

The termination site for transcription is recognized by?

A) α−Subunit of DNA-dependent RNA polymerase B) β−Subunit of DNA-dependent RNA polymerase C) Sigma factor D) Rho factor

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Question 338

The initiation site for transcription is recognized by?

A) α−Subunit of DNA-dependent RNA polymerase B) β−Subunit of DNA-dependent RNA polymerase C) Sigma factor D) Rho factor

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Question 339

DNA-dependent RNA polymerase is a?

A) Monomer B) Dimer C) Trimer D) Tetramer

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Question 340

Direction of RNA synthesis is?

A) 5′ → 3’ B) 3′ → 5’ C) Both 1⃣ and 2⃣ D) None of these

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