Of the following statements about enzymes which ones are true

$(i)$ Enzymes lack in nucleophilic groups

$(ii)$ Enzymes are highly specific both in binding chiral substrates and in catalyzing their reactions

$(iii)$ Enzymes catalyse chemical reactions by lowering the activation energy

$(iv)$ Pepsin is a proteolytic enzyme

Question

Of the following statements about enzymes which ones are true

$(i)$ Enzymes lack in nucleophilic groups

$(ii)$ Enzymes are highly specific both in binding chiral substrates and in catalyzing their reactions

$(iii)$ Enzymes catalyse chemical reactions by lowering the activation energy

$(iv)$ Pepsin is a proteolytic enzyme

AIPMT 1995, Medium

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