Transition state structure of the substrate formed during an enzymatic reaction is

1.transient but stable

2.permanent but unstable

3.transient and unstable

4.permanent and stable

Subtopic:  Enzyme Catalysis |
 86%
From NCERT
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Which of the following is correct for enzyme catalysed reaction?

1.Substrate is converted into Enzyme

2.Substrate is consumed in the reaction completely

3.Substrate is converted to product

4.Enzyme is converted to product

Subtopic:  Enzyme Catalysis |
 87%
From NCERT
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Which of the following is incorrect?

1.Enzymatic activity is maximum at its optimim pH and temperature.

2.Enzymatic activity declines both below and above the optimum value.

3.Low temperatures destroys enzymatic activity

4.High temperatures destroys enzymatic activity

Subtopic:  Properties of Enzymes |
 86%
From NCERT
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Which of the following destroys the Enzymatic activity?

1.high temperature

2.low temperature

3.pH

4.Both 2 and 3

Subtopic:  Properties of Enzymes |
 88%
From NCERT
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Which of the following factors can influence enzyme activity?

1. High temperature

2. pH

3. Substrate concentration

4. All of these

Subtopic:  Properties of Enzymes |
 95%
From NCERT
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The competitive inhibitor of enzyme succinic dehydrogenase is

1.succinate

2.malonate

3.malate

4.mannose

Subtopic:  Enzyme Inhibition: Introduction | Enzyme Inhibition |
 92%
From NCERT
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km (Michaelis constant) value of enzyme is the substrate concentration at which velocity of reaction is

1.Vmax

2.one fourth of Vmax

3.One third of Vmax

4.half of Vmax

Subtopic:  Properties of Enzymes |
 93%
From NCERT
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Select the option which is not correct with respect to enzyme action:

1.Substrate binds with enzyme at its active site

2.Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate

3.A non- competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate

4.Malonate is a competitive inhibitor of succinic dehydrogenase

Subtopic:  Enzyme Inhibition |
 80%
From NCERT
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Which of the following class of enzyme is used for catalysing hydrolysis of ester, ether, peptide bonds?

1.Lyases

2.Ligases

3.Hydrolases

4.Both 1 and 2

Subtopic:  Enzymes Classification |
 87%
From NCERT
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Which of the following class of enzymes helps in catalysing a transfer of a group(other than hydrogen) between a pair of substrates?

1.Ligases

2.Lyases

3.Transferases

4.Hydrolases

Subtopic:  Enzymes Classification |
 90%
From NCERT
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