Nucleic Acids - Mock Test 8

Question 71

Which one of the following contributes nitrogen atoms to both purine and pyrimidine rings?

A) Aspartate B) Carbanoyl phosphate C) Carbondioxide D) Tetrahydrofolate

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Question 72

tRNA has?

A) Clover leaf structure B) anticodon arm C) poly ‘A’ tay 3’ D) Cap at 5’ end

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Question 73

Nucleic acid show strong absorption at one of the wavelength?

A) 280 nm B) 220 nm C) 360 nm D) 260 nm

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Question 74

Orcinol method is employed in the quantitation of?

A) Nucleic acid B) DNA C) RNA D) Proteins

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Question 75

Diphenylamine method is employed in the quantitation of?

A) Nucleic acid B) RNA C) DNA D) Proteins

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Question 76

Uric acid is the catabolic end product of?

A) Porphyrine B) Purines C) Pyrimidines D) Pyridoxine

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Question 77

Carbon 6-of purine skeleton comes from?

A) Atmospheric CO2 B) 1 carbon carried by folate C) Betoine D) Methionine

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Question 78

A common substrate of HGPRTase, APRTase and PRPP glutamyl amidotransferase is?

A) Ribose 5 phosphate B) Phosphoribosyl pyrophosphate C) Hypoxanthine D) Adenosine

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Question 79

Glycine gives __________ atoms of purine?

A) C2, C3 B) C4, C5 and N7 C) C4, C5 and N9 D) C4, C6 and N7

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Question 80

Catabolism of thymidylate gives?

A) α-alanine B) β-alanine C) α-aminoisobutyrate D) β-aminoisobutyrate

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