Which of the following statements about enzymes is true? (a) Enzymes catalyse chemical reactions...

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Which of the following statements about enzymes is true?
(a) Enzymes catalyse chemical reactions by increasing the activation energy.
(b) Enzymes are highly specific both in binding chiral substrates and in catalysing their reactions.
(c) Enzymes lack in nucleophilic groups.
(d) Pepsin is proteolytic enzyme.
 
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