An enzyme acts by

Reducing the energy of activation.

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Increasing the energy of activation.

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Decreasing the pH.

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Increasing the pH.

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Solution

The correct option is A Reducing the energy of activation.
The reactants do not undergo chemical change automatically. They do so in transition state. Transition state has more free energy than reactants or products. The inability of reactants to undergo change due to requirement of extra energy for converting them to transition state is called as 'Energy Barrier'. Energy required to overcome energy barrier is called as 'Activation Energy'.

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Similar questions

Q. The factor that can reduce the enzyme activity is
I. Increasing pH level
II. Decreasing temperature
III. Placing enzyme in a nonpolar liquid

Consider the Arrhenius equation given below and mark the correct option.
$k = A . e - \frac{E_{a}}{R T}$
(a) Rate constant increases exponentially with increasing activation energy and decreasing temperature
(b) Rate constant decreases exponentially with increasing activation energy and decreasing temperature
(c) Rate constant increases exponentially with decreasing activation energy and decreasing temperature
(d) Rate constant increases exponentially with decreasing activation energy and increasing temperature

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

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into

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and

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e^{40}

times at

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Q. In presence of an enzyme, the activation energy

Q. The reduction in the enzyme activity takes place by
I. Decreasing pH level
II. Increasing temperature
III. Placing enzyme in a non polar liquid

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