Enzymes - Mock Test 12

Question 111

Allosteric inhibition?

A) Makes active site unifit for substrate B) Controls excess formation and end product C) Both A and B D) None of these

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Question 112

Feedback term refers to 1⃣ Effect of substrate on rate of enzymatic reaction?

A) Effect of substrate on rate of enzymatic reaction? B) Effect of end product on rate reaction C) Effect of enzyme concentration on rate of reaction D) Effect of external compound on rate of reaction

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Question 113

An example of feedback inhibition is?

A) Allosteric inhibition of hexokinase by glucose6-phosphate B) Cyanide action on cytochrome C) Sulpha drug on folic acid synthesizer bacteria D) Reaction between succinic dehydrogenase and succinic acid

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Question 114

Key and lock hypothesis of enzyme action was given by?

A) Fischer B) Koshland C) Buchner D) Kuhne

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Question 115

Which is not true about inorganic catalysts and enzymes?

A) They are specific B) Inorganic catalysts require specific not needed by enzymes C) They are sensitive to pH D) They speed up the rate of chemical reaction

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Question 116

Genetic engineering requires enzyme?

A) DNA ase B) Amylase C) Lipase D) Restriction endonuclease

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Question 117

Coenzyme is?

A) Often a vitamin B) Always an inorganic compound C) Always a protein D) Often a metal

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Question 118

Feedback inhibition of enzyme is influenced by?

A) Enzyme B) External factors C) End product D) Substrate

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Question 119

An enzyme brings about?

A) Decrease in reaction time B) Increase in reaction time C) Increase in activation energy D) Reduction in activation energy

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Question 120

Enzyme inhibition caused by a substance resembling substrate molecule is?

A) Competitive inhibition B) Non-competitive inhibition C) Feedback inhibition D) Allosteric inhibition

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