Enzymes - Mock Test 28

Question 271

All of the following are allosteric enzymes except?

A) Citrate synthetase B) a-Ketoglutarate dehdrogenase C) Succinate thiokinase D) Succinate dehydrogenase

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Question 272

Isocitrate dehydrogenase is allosterically inhibited by?

A) Oxalosuccinate B) α-Ketoglutarate C) ATP D) NADH

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Question 273

Malonate is an inhibitor of?

A) Malate dehydrogenase B) α-Ketoglutarate dehydrogenase C) Succinate dehydrogenase D) Isocitrate dehydrogenase

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Question 274

In citric acid cycle, GDP is phosphorylated by?

A) Succinate dehydrogenase B) Aconitase C) Succinate thiokinase D) Fumarse

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Question 275

Among citric acid cycle enzymes, a flavoprotein is?

A) Malate B) Fumarase C) Succinate dehrogenase D) Isocitrate dehrogenase

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Question 276

In citric acid cycle, NAD is reduced in?

A) One reactions B) Two reactions C) Three reactions D) Four reactions

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Question 277

Ribozymes?

A) RNA enzyme B) Non-protein enzymes C) Catalyst function D) All of these

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Question 278

An allosteric inhibitor of pyruvate dehydrogenase is?

A) Acetyl CoA B) ATP C) NADH D) Pyruvate

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Question 279

Pyruvate dehydrogenase complex is regulated by?

A) Covalent modification B) Allosteric regulation C) Both ( A ) and ( B ) D) None of these

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Question 280

A flavoprotein in pyruvate dehydrogenase complex is?

A) Pyruvate dehydrogenase B) Didrolipoyl acetyl transferase C) Dihydrolipoyl dehydrogenase D) None of these

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