Which one of the following statements is not true about enzymes ?
A
Enzymes work as catalysts by lowering the activation energy of a biochemical reation.
BThe action of enzymes is temperature and $\mathrm{pH}$ specific.
C
Almost all enzymes of proteins.
D
Enzymes are non-specific for a reaction and substrate.
JEE MAIN 2021, Medium
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D
Enzymes are non-specific for a reaction and substrate.
d Enzymes are highly specific both in the reactions that they catalyzed and in their choice of reactions, which are called substrates.
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Treatment of compound $O$ with $KMnO_4 / \mathrm{H}^{+}$gave $P$, which on heating with ammonia gave $Q$. The compound $Q$ on treatment with $Br_2 / NaOH$ produced $R$. On strong heating, $Q$ gave $S$, which on further treatment with ethyl $2$-bromopropanoate in the presence of $KOH$ followed by acidification, gave a compound $T$.