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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Which of the following is correct?

1. Enzyme has a active site so that a highly reactive enzyme-substrate complex is produced.

2. ES complex is short lived.

3. The formation of ES complex is essential for catalysis.

4. All of these

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Which of the following is incorrect?

1. The substrate binds to the active site of the enzyme

2. The binding of the substrate induces the enzyme to alter its shape.

3. The active site of the enzyme when it is in close proximity of the substrate breaks the chemical bonds of the substrate.

4. None of these

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Which of the following is correct for enzyme catalysed reaction?

1. Substrate is conveted into Enzyme

2. Substrate is consumed in the reaction completely

3. Substrate is converted to product

4. Enzyme is converted to product

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