Which of the following is true about carbonic anhydrase?

1. It accelerates the rate of  formation of carbonic acid by 10 million times.

2. In its absence only 200 molecules of carbonic acid is formed in an hour.

3. It forms 600,000 molecules  of carbonic acid in one second.

4. All of these

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Find the correct statement

1. Catalysed reactions proceed at rates higher than that of uncatalysed ones.

2. In skeletal muscle under anaerobic conditions lactic acid is formed from pyruvic acid.

3. In yeast during fermentation ethanol is formed from pyruvic acid.

4. All of these

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Which of the following is correct?

1. The chemical or metabolic conversion refers to a reaction.

2. The chemical which is converted into a product is called a substrate.

3. Proteins with three dimensional structures including an active site is called enzyme.

4. All of these

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Which of the following is incorrect?

1. The chemical or metabolic conversion refers to a reaction.

2. The chemical which is converted into a product is called an enzyme.

3. Proteins with three dimensional structures including an active site is called enzyme.

4. Enzymes convert a substrate into a product.

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Which of the following describes the given graph correctly?    

 

1. ndothermic reaction with energy A in presence of enzyme and B in absence of enzyme

2. Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme

3. Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme

4. Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme

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

 

A

B

C

D

(A)

 

Potential

energy

Transition

state

Activation

Energy with enzyme

Activation energy with- out enzyme

(B)

Transition

State

Potential

Energy

Activation

Energy with-out enzyme

Activation energy with enzyme

(C)

 

Activation energy with-out enzyme

Transition state

Activation energy with enzyme

Potential energy

(D)

 

Activation energy with enzyme

Transition state

Activation energy with-out enzyme

Potential energy

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Which of the following is correct?

1. The ES complex formation is a transient phenomenon

2. The structure of the substrate gets transformed into the structure of product.

3. All the structures formed between substrate and product are called intermediates.

4. All of these

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Which of the following is incorrect?

1. The ES complex formation is a transient phenomenon

2. The structure of the substrate gets transformed into the structure of product.

3. All the structures formed between substrate and product are called intermediates.

4. Intermediates are highly stable.

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Which of the following is  not true for the graph?

1. The reaction is exothermic

2. The reaction is endothermic

3. The product is more stable than substrate

4. The difference in average energy content of substrate from that of transition state is called activation energy.

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The role of an enzyme in a reaction is to/as

1. Decrease activation energy

2. Increase activation energy

3. Inorganic catalyst

4. Increase potential energy

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