The role of an enzyme in a reaction is to

decrease activation energy

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increase activation energy

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both a and b depending on the substrate

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increase potential energy

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Solution

The correct option is A decrease activation energy
The minimum amount of energy provided for a chemical reaction to happen is called activation energy. The rate of reaction increases with decrease in activation energy. The role of an enzyme is to decrease the activation energy of the reaction making the transition of substrate (S) to product (P) more easily as shown below.

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Similar questions

Q. The figure given above shows the conversion of a substrate into produced by an enzyme. In which one of the four option (1-4), the components of reaction labelled as A, B, C and D are identified correctly.

	A	B	C	D
1	Activation energy with enzyme	Transition state	Activation energy without enzyme	Potential energy
2	Potential energy	Transition state	Activation energy with enzyme	Activation energy without enzyme
3	Transition state	Potential energy	Activation energy without enzyme	Activation energy with enzyme
4	Potential energy	Transition state	Activation energy with enzyme	Activation energy without enzyme

Q. In presence of an enzyme, the activation energy

Q. The activation energy of a reaction is dependent on:

Q. An enzyme ‘catalase’ increases the rate of decomposition of

H_{2} O_{2} (a q)

into

H_{2} O (l)

and

O_{2} (g)

e^{40}

times at

300 K

. The activation energy of enzyme catalysed reaction is

4.0 k c a l / m o l

. The activation energy of uncatalysed reaction is

Which of the following statements are in accordance with the Arrhenius equation?
(a) Rate of a reaction increases with increase in temperature
(b) Rate of a reaction increases with a decrease in activation energy
(c) Rate constant decreases exponentially with an increase in temperature
(d) Rate of reaction decreases with a decrease in activation energy

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