Enzymes catalyse chemical reactions by lowering the activation energy
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Enzymes are highly specific, both in binding chiral substrates and in catalysing their reactions
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Enzymes do not possess nucleophillic groups
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Pepsin is a proteolytic enzyme
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Solution
The correct option is C Enzymes do not possess nucleophillic groups
a) Enzymes catalyse a chemical reaction by stabilising the transition state, thereby lowering the activation energy.
b) Enzymes are highly specific both in binding chiral substrates and in
catalysing their reactions.
c) Enzymes are protein molecules which have plenty of groups like −OH,
−NH2 that can act as nucleophiles.
d) Pepsin is proteolytic enzyme
Enzymes are non-specific for a reaction and substrate
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The action of enzymes is temperature and pH specific
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Almost all enzymes are proteins
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Enzymes work as catalysts by lowering the activation energy of a biochemical reaction
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Solution
The correct option is A Enzymes are non-specific for a reaction and substrate
Enzymes are mostly proteins. They function as catalysts in biochemical reactions by lowering the energy of activation.
Characteristics of Enzyme:
1. Highly specific nature
Each enzyme is specific for a given reaction.One catalyst cannot catalyse more than one reaction. Example: The enzyme urease catalyses the hydrolysis of urea only.It does not catalyse hydrolysis of any other amide.
2. Highly active under optimum temperature
The rate of an enzyme reaction becomes
maximum at a definite temperature known as optimum temperature.On either side of the optimum temperature, the enzyme activity decreases.
3. Highly active under optimum pH
The rate of an enzyme-catalysed reaction is maximum at a particular pH known as optimum pH
Hence, option (b) is correct.
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Which of the following stateme...
Updated On: 27-06-2022
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Text Solution
Enzymes are non specificEnzymes are temperature and pH specificalmost all Enzymes are proteinsEnzymes act as catalyst
Answer
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