A change in an amino acid located distantly from the active site of an enzyme can affect the specificity of the enzyme towards its substrate by:

1. making the enzyme unstable
2. cause a relocation of the enzyme within a cell
3. changing the shape of the protein
4. changing the optimum pH and temperature values for the enzyme

Subtopic:  Factors Affecting Enzyme Catalysis Reaction |
 66%
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An amino acid that is negative charged amongst the following will be:

1. Glutamic acid 2. Lysine
3. Arginine 4. Histidine
Subtopic:  Amino Acids |
 71%
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The metal ion that acts as a co-factor for both alcohol dehydrogenase and carbonic anhydrase is:

1. Magnesium 2. Iron
3. Zinc 4. Nickel
Subtopic:  Enzyme Cofactors |
 82%
From NCERT
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The living state can be best described as a:
1. non equilibrium steady state
2. non equilibrium non steady state
3. equilibrium non steady state
4. equilibrium steady state

Subtopic:  THE LIVING STATE (OLD NCERT) |
 82%
From NCERT
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The blood concentration of glucose in a normal healthy individual is:

1. 3.5 – 4.0 mM 2. 4.0 – 4.5 mM
3. 4.2 – 6.1 mM 4. 5.0 – 5.5 mM
Subtopic:  THE LIVING STATE (OLD NCERT) |
 61%
From NCERT
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Consider the following two statements regarding enzyme action:

I: Co-factors play a crucial role in the catalytic activity of the enzyme.
II: Catalytic activity is reduced when the co-factor is removed from the enzyme.

Of the above statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct

Subtopic:  Enzyme Cofactors |
From NCERT
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Assuming they all had the same number of carbon atoms, which of the following has the most C-H bonds?
1. an unsaturated fat
2. a polyunsaturated fat
3. a polysaccharide
4. a saturated fat

Subtopic:  Lipids |
 60%
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An alpha helix is a:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein

Subtopic:  Proteins |
 81%
From NCERT
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The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition

Subtopic:  Enzyme Inhibition |
 90%
From NCERT
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The enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds are called as:

1. Oxidoreductases 2. Hydrolases
3. Ligases 4. Lyases
Subtopic:  Enzymes Classification |
 84%
From NCERT
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