How does the presence of an enzyme affect the | vedclass

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(B) Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy $(E_a)$ required for the reaction to proceed.B

Vedclass · Accepted Answer

It decreases it.

Vedclass · Answer

(B) Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy $(E_a)$ required for the reaction to proceed.By providing an alternative reaction pathway with a lower energy transition state,enzymes allow a greater number of substrate molecules to reach the energy threshold at a given temperature,thereby increasing the rate of the reaction.

Column $I$	Column $II$
$i$. Purely proteinaceous enzyme	$a$. Glucokinase
$ii$. Conjugated enzyme	$b$. Epimerase
$iii$. Transferase enzyme	$c$. Protease
$iv$. Isomerase enzyme	$d$. $FMN$

How does the presence of an enzyme affect the activation energy of a reaction?

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Match the types of enzymes in Column-$I$ with examples in Column-$II$ and select the correct option.
Column $I$ Column $II$
$i$. Purely proteinaceous enzyme $a$. Glucokinase
$ii$. Conjugated enzyme $b$. Epimerase
$iii$. Transferase enzyme $c$. Protease
$iv$. Isomerase enzyme $d$. $FMN$

Assertion : Enzymes lower the activation energy.
Reason : $A$ substrate molecule can be acted upon by a particular enzyme.

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