Enzymes - Mock Test 16

Question 151

Which one of the following statements is not characteristic of allosteric enzymes?

A) They frequently catalyze a committed step early in a metabolic pathway B) They are often composed of subunits C) They follow Michaelis-Menten kinetics D) They frequently show cooperativity for substrate binding

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Question 152

Alkaloids are usually purified by extraction with?

A) Ether B) Dil HCl C) NaOH D) Chloroform

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Question 153

Alkaloids are usually purified by extraction with?

A) Ether B) Dil HCl C) NaOH D) Chloroform

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Question 154

The poisonous alkaloid present in the oil of hemlock is?

A) Cocaine B) Nicotine C) Quinine D) Morphine

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Question 155

Nicotine present in tobacco is a/an?

A) Alkaloid B) Terpene C) Steroid D) Protein

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Question 156

The number of enzymes known is about?

A) 10,000 B) 100 C) 50 D) 26

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Question 157

Which of the following is not true regarding enzymes?

A) They catalyze only a particular type of reaction B) They remain active even after separation from the source C) They are destroyed after the completion of the reaction they catalyse D) They are irreversibly destroyed at high temperature (E) Their activity depends on the pH of the solution

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Question 158

Enzymes activity is controlled by?

A) pH of the solution B) Temperature C) Concentration of the enzyme D) Concentration of the substrate (E) All of these

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Question 159

Which of the following statements is true?

A) Enzymes have names ending ase B) Enzymes are highly specific in their action C) Enzymes are living organisms D) Enzymes get activated on heating

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Question 160

Diastase can be used for the hydrolysis can be used for the hydrolysis of?

A) Sucrose B) Starch C) Cellulose D) Maltose

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