Nucleic Acids - Mock Test 31

Question 301

All the following statements about genetic code are correct except?

A) It is degenerate B) It is unambigous C) It is nearly universal D) It is overlapping

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Question 302

Genetic code is said to be degenerate because?

A) It can undergo mutations B) A large proportion of DNA is non-coding C) One codon can code for more than one amino acids D) More than one codons can code for the same amino acids

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Question 303

Nonsense codons are present on?

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

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Question 304

Codons are present on?

A) Non-coding strand of DNA B) hnRNA C) tRNA D) None of these

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Question 305

Anticodons are present on?

A) Coding strand of DNA B) mRNA C) tRNA D) rRNA

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Question 306

All of the following statements about tRNA are true except?

A) It is synthesized as a large precursor B) It is processed in the nucelolus C) It has no codons or anticodons D) Genes for rRNA are present in single copies

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Question 307

tRNA genes have?

A) Upstream promoters B) Downstream promoters C) Intragenic promoters D) No promoters

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Question 308

In sanger’s method of DNA sequence determination, DNA synthesis is stopped by using?

A) 1′, 2′- Dideoxyribonucleoside triphosphates B) 2′, 3′- Dideoxyribonucleoside triphosphates C) 2′, 4′- Dideoxyribonucleoside triphosphates D) 2′, 5′ - Dideoxyribonucleoside triphosphates

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Question 309

All of the following statements about eukaryotic promoters are true except?

A) They may be located upstream or down stream from the structural gene B) They have two consensus sequences C) One consensus sequence binds RNA polymerase D) Mutations in promoter region can decrease the efficiency of transcription of the structural gene

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Question 310

All of the following statements about bacterial promoters are true except?

A) They are smaller than eukaryotic promoters B) They have two consensus sequences upstream from the transcription star site C) TATA box is the site for attachment of RNA polymerase D) TATA box has a high melting temperature

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