Enzymes - Mock Test 30

Question 291

Enzymes requiring NAD as co-substrate can be assayed by measuring change in absorbance at?

A) 210 nm B) 290 nm C) 340 nm D) 365 nm

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Question 292

In enzyme assays, all the following are kept constant except?

A) Substrate concentration B) Enzyme concentration C) pH D) Temperature

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Question 293

Covalent modification of an enzyme usually involves phosphorylation / dephosphorylation of?

A) Serine residue B) Proline residue C) Hydroxylysine residue D) Hydroxyproline residue

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Question 294

Kinetics of an allosteric enzyme are explained by?

A) Michaelis-Menten equation B) Lineweaver-Burk plot C) Hill plot D) All of these

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Question 295

Enzymes accelerate the rate of reactions by?

A) Increasing the equilibrium constant of reactions B) Increasing the energy of activation C) Decreasing the energy of activation D) Decreasing the free energy change of the reaction

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Question 296

All of the following are iron-containing enzymes except?

A) Carbonic anhydrase B) Catalase C) Peroxidase D) Cytochrome oxidase

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Question 297

All of the following are zinc-containing enzymes except?

A) Acid Phosphatase B) Alkaline Phosphatase C) Carbonic anhydrase D) RNA polymerase

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Question 298

Ceruloplasmin oxidizes?

A) Copper B) Iron C) Both 1⃣ and 2⃣ D) None of these

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Question 299

Ceruloplasmin is absent in?

A) Cirrhosis of liver B) Wilson’s disease C) Menke’s disease D) Copper deficiency

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Question 300

Lactate dehydrogenase is a?

A) Monomer B) Dimer C) Tetramer D) Hexamer

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