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Arrhenius Equation

Catalase is a...

Question

Catalase is an enzyme that acts upon hydrogen peroxide and breaks it down into water and oxygen gas. Which of the following factors will affect the rate of this enzyme catalyzed reaction?
I. A change in the concentration of catalase
II. A change in the concentration of hydrogen peroxide
Ill. A change in the concentration of sodium ions

A

I only

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B

II only

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C

III only

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D

I and II only

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E

I, II, and Ill

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Solution

The correct option is A I only
The more the amount of enzyme catalase will be there, more will be the decomposition of hydrogen peroxide into water and oxygen gas. Hence increase in enzyme concentration can increase the rate of reaction while decrease in enzyme concentration can decrease the rate of reaction.
So, a change in the concentration of catalase will affect the rate of the enzyme catalysed reaction.
So, the correct answer is 'I only'.

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Similar questions

Q. Enzyme catalyzed reactions are affected by various changes in the reaction environment. Which of the following changes can affect an enzyme catalyzed reaction?
I. A change in temperature
II. A change in pH
III. A change in salinity

Q. Complete the following passage(s) with an appropriate word/term to be filled in the blank spaces.
Apoenenzyme, Polypeptide, Prosthetic, Co-enzyme, Cofactors
Enzymes are composed of one or several .......... (1) ........ chains. However, there are a number of cases in which non-protein constituents called ........(2)........ are bound to the the enzyme to make the enzyme catalytically active. In these instances, the protein portion of the enzymes is called the ..........(3)......... Three kinds of cofactors may be identified prosthetic groups, co-enzymes and metal ions. ..........(4).......... groups are organic compounds and are distinguished from other cofactors in that they are tightly bound to the apoenzyme. For example, in peroxidase and catalase, which catalyze the breakdown of hydrogen peroxide to water and oxygen, haem is the prosthetic group and it is a part of the active site of the enzyme. .......(5)......... are also organic compounds but their association with the apoenzyme is only transient, usually occurring during the course of catalysis, Furthermore co-enzymes serve as co-factors in a number of different enzyme catalyzed reactions. The essential chemical components of many coenzymes are vitamins, e.g., coenzyme nicotinamide adenine dinucleotide (NAD) and NADP contain the vitamin niacin.

Q. Which of the following factors can affect the enzymatic activity?
A. Change in temperature B. Change in pH
C. Change in substrate concentration D. Binding of specific chemical to enzyme

Q. For the reaction A + B

\to

products, it is observed that :-
(a) on doubling the initial concentration of A only, the rate of reaction is also doubled and
(b) on doubling the initial concentrations of both A and B, there is a change by a factor of 8 in the rate of the reaction.

Q. Which of the following factors can affect the enzymatic activity?
A. Change in temperature
B. Change in pH
C. Change in substrate concentration
D. Binding of specific chemical to enzyme

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