Nucleic Acids - Mock Test 44

Question 431

PRPP synthetase is allosterically inhibited by?

A) AMP B) ADP C) GMP D) All of these

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Question 432

All of the following enzymes are unique to purine nucleotide synthesis except?

A) PRPP synthetase B) PRPP glutamyl amido transferase C) Adenylosuccinate synthetase D) IMP dehydrogenase

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Question 433

In the pathway of de novo synthesis of purine nucleotides, all the following are allosteric enzymes except?

A) PRPP glutamyl amido transferase B) Adenylosuccinate synthetase C) IMP dehydrogenase D) Adenylosuccinase

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Question 434

Xanthosine monophosphate is an intermediate during de novo synthesis of?

A) TMP B) CMP C) AMP D) GMP

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Question 435

Inosine monophophate is an intermediate during the de novo synthesis of?

A) AMP and GMP B) CMP and UMP C) CMP and TMP D) All of these

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Question 436

5-Phosphoribosyl-1-pyrophosphate is required for the synthesis of?

A) Purine nucleotides B) Pyrimidine nucleotides C) Both 1⃣ and 2⃣ D) None of these

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Question 437

In the purine nucleus, carbon 6 is contributed by?

A) Glycine B) CO2 C) Aspartate D) Glutamine

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Question 438

For de novo synthesis of purine nucleotides, aspartate provides?

A) Nitrogen 1 B) Nitrogen 3 C) Nitrogen 7 D) Nitrogen 9

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Question 439

For de novo synthesis of purine nucleotides, glycine provides?

A) One nitrogen atom B) One nitrogen and one carbon atom C) Two carbon atoms D) One nitrogen and two carbon atoms

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Question 440

The nitrogen atoms for de novo synthesis of purine nucleotides are provided by?

A) Aspartate and glutamate B) Aspartate and glycine C) Aspartate, glutamine and glycine D) Aspartate, glutamate and glycine

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