Nucleic Acids - Mock Test 53

Question 521

Genetic information flows from?

A) DNA to DNA B) DNA to RNA C) RNA to cellular proteins D) DNA to cellular proteins

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Question 522

Polysomes lack in?

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

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Question 523

Enzymic deficiency in β-aminoisobutyric aciduria is?

A) Adenosine deaminase B) Xanthine oxidase C) Orotidylate decarboxylase D) Transaminase

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Question 524

An autosomal recessive disorder, xanthinuria is due to deficiency of the enzymes?

A) Adenosine deaminase B) Xanthine oxidase C) HGPRTase D) Transaminase

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Question 525

Orotic aciduria type II reflects the deficiency of the enzyme?

A) Orotate phosphoribosyl transferase B) Orotidylate decarboxylase C) Dihydroorotase D) Dihydroorotate dehydrogenase

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Question 526

Orotic aciduria type I reflects the deficiency of enzymes?

A) Orotate phosphoribosyl transferase and orotidylate decarboxylase B) Dihydroorotate dehydrogenase C) Dihydroorotase D) Carbamoyl phosphate synthetase

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Question 527

The major catabolic product of pyrimidines in human is?

A) β-Alanine B) Urea C) Uric acid D) Guanine

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Question 528

The major catabolic product of pyrimidines in human is?

A) β-Alanine B) Urea C) Uric acid D) Guanine

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Question 529

Lesch-Nyhan syndrome, the sex linked, recessive absence of HGPRTase, may lead to?

A) Compulsive self destructive behaviour with elevated levels of urate in serum B) Hypouricemia due to liver damage C) Failure to thrive and megaloblastic anemia D) Protein intolerance and hepatic encephalopathy

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Question 530

Lesch-Nyhan syndrome, the sex linked recessive disorder is due to the lack of the enzyme?

A) Hypoxanthine-guanine phosphoribosyl transferse B) Xanthine oxidase C) Adenine phosphoribosyl transferase D) Adenosine deaminase

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