Select the option which is not correct with respect to enzyme action:
1. Substrate binds with enzyme at its active site.
2. Addition of a 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 |
 78%
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Which one of the following statements is wrong?
1. Glycine is a sulphur containing amino acid.
2. Sucrose is a disaccharide.
3. Cellulose is a polysaccharide.
4. Uracil is a pyrimidine.

Subtopic:  Amino Acids |
 88%
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Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?

1. Ester bonds 2. Hydrogen bonds
3. Electrostatic interaction 4. Hydrophobic interaction
Subtopic:  Proteins |

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The R group in a proteinaceous amino acid is hydroxymethyl. This amino acid:
1. is not an essential amino acid
2. is not genetically coded for
3. is involved in disulfide linkage
4. is acidic in nature

Subtopic:  Amino Acids |
 68%

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Which of the following components is found in least amounts in an average cell?

1. Carbohydrates 2. Fats
3. Nucleic acids 4. Proteins
Subtopic:  Introduction |
 70%
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Most hydrated and most stable form of DNA is known as:

1. A DNA 2. B DNA
3. C DNA 4. Z DNA
Subtopic:  The DNA |
 89%
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A pure protein should normally have

1. Two ends 2. One end
3. Three ends 4. No ends

Subtopic:  Proteins |
 89%

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The rate of enzyme action decreases at higher temperature [after a certain value] because the increased heat
1. changes the pH of the system
2. alters the active site of the enzyme
3. neutralizes the acids and bases in the system
4. increases the concentration of the enzyme

Subtopic:  Factors Affecting Enzyme Catalysis Reaction |
 81%
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The number of high energy bonds in a molecule of ATP is:

1. 1 2. 2
3. 3 4. 4
Subtopic:  Nucleic Acid: Nucleotides |
 52%

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The living state is synonymous with:
1. Cellular organization
2. Metabolism
3. Consciousness
4. Reproduction

Subtopic:  METABOLIC BASIS FOR LIVING (OLD NCERT) |
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