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Q. No.A Zwitterionic amino acid at physiological pH contains:
| 1. | A single phosphate group carrying charge |
| 2. | Only neutral amino and carboxyl groups |
| 3. | Multiple methyl groups with no charge |
| 4. | Both positive NH₃⁺ and negative COO⁻ groups |
Subtopic: Amino Acids |
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Level 1: 80%+
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The most reactive portion of an enzyme for substrate binding is the:
| 1. | Active site maintained by tertiary structure |
| 2. | Allosteric site required for inhibition only |
| 3. | Peripheral domain used in transport |
| 4. | C-terminal region used for secretion |
Subtopic: Enzymes |
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Level 1: 80%+
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A non-reducing sugar is:
| 1. | Cellobiose present in cell wall cellulose |
| 2. | Maltose formed from two glucose units |
| 3. | Lactose formed from galactose and glucose |
| 4. | Sucrose formed from glucose and fructose |
Subtopic: Carbohydrates |
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Level 1: 80%+
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Consider the following statements regarding biomolecules:
Which of the statements given above are correct?
1. I and II only
2. II and III only
3. I and III only
4. I, II and III
| I: | Proteins are polymers of amino acids. |
| II: | Lipids are true polymers. |
| III: | Glycosidic bond links monosaccharides. |
1. I and II only
2. II and III only
3. I and III only
4. I, II and III
Subtopic: Proteins | Carbohydrates: Glycosidic Bond & Disaccharide | Biomacromolecules |
84%
Level 1: 80%+
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Which of the following statements regarding enzymes is correct?
| 1. | Enzymes increase the free energy change of reactions |
| 2. | Enzymes are highly specific due to tertiary structure |
| 3. | Enzymes always function at neutral pH |
| 4. | Enzymes convert endergonic reactions into exergonic ones |
Subtopic: Enzymes |
89%
Level 1: 80%+
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Subtopic: Lipids |
90%
Level 1: 80%+
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Which of the following statements regarding nucleic acids is correct?
| 1. | RNA contains thymine |
| 2. | DNA has ribose sugar |
| 3. | Phosphodiester bonds link nucleotides |
| 4. | Hydrogen bonds link sugar and base |
Subtopic: Nucleic Acid |
83%
Level 1: 80%+
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Inhibition of succinic dehydrogenase by malonate is an example of:
| 1. | Allosteric feedback inhibition |
| 2. | Un-competitive inhibition |
| 3. | Non-competitive inhibition |
| 4. | Competitive inhibition |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
93%
Level 1: 80%+
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Which of the following combinations of statements is CORRECT regarding amino acids?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III only
| (I) | α-amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon. |
| (II) | There are only twenty types of amino acids in total. |
| (III) | Tyrosine, phenylalanine, and tryptophan are aromatic amino acids. |
1. I and II only
2. I and III only
3. II and III only
4. I, II and III only
Subtopic: Amino Acids |
Level 3: 35%-60%
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Match List-I with List-II:
1. A - P, B - Q, C - R, D - S
2. A - Q, B - P, C - R, D - S
3. A - Q, B - P, C - S, D - R
4. A - P, B - Q, C - S, D - R
| List-I | List-II | ||
| A: | Palmitic acid | P: | Has 16 carbons including carboxyl carbon |
| B: | Arachidonic acid | Q: | Has 20 carbon atoms including the carboxyl carbon |
| C: | Glycerol | R: | Phospholipid |
| D: | Lecithin | S: | Trihydroxypropane |
1. A - P, B - Q, C - R, D - S
2. A - Q, B - P, C - R, D - S
3. A - Q, B - P, C - S, D - R
4. A - P, B - Q, C - S, D - R
Subtopic: Miscellaneous |
82%
Level 1: 80%+
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