Chief Editor
Chief Editor
 Mar 09, 2023
1
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What is TRUE about enzymes? 
Difficulty: Medium
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A:

They make biochemical reactions to proceed spontaneously 

B:

They lower the activation energy of a reaction 

C:

They are not very specific in their choice of substrates 

D:

They are needed in large quantities 

To what category of molecules do enzymes belong?
Difficulty: Easy
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A:

Carbohydrates

B:

Lipids 

C:

Nucleic acids

D:

Proteins

What is TRUE about cofactors? 
Difficulty: Easy
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A:

Break hydrogen bonds in proteins 

B:

Help facilitate enzyme activity

C:

Increase activation energy

D:

Are composed of proteins 

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Prosthetic groups are.
Difficulty: Easy
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A:

Required by all enzymes

B:

Loosely attached with enzymes 

C:

Proteins in nature

D:

Tightly bound to the enzyme 

When we add more substrate to an already occurring enzymatic reaction and there is no increase in the rate of reaction, what would you predict? 

Difficulty: Medium
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A:

All active site have been occupied by substrate molecules 

B:

The enzyme molecules have denatured 

C:

More substrate acted as inhibitor 

D:

More substrate has disturbed the pH of the medium 

Which of these graphs correctly shows the effect of temperature on the rate of an enzyme-controlled reaction?

Difficulty: Medium
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A:

A

B:

B

C:

C

D:

D

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