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Q. No.The ‘alpha helix’ describes the:
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: Different Amino Acids |
84%
From NCERT
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If a dsDNA molecule is composed of 26% thymine, what would be the percent composition of cytosine in this DNA molecule?
1. 26
2. 24
3. 13
4. 48
1. 26
2. 24
3. 13
4. 48
Subtopic: The DNA |
88%
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Subtopic: Lipids |
75%
From NCERT
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What type of lipid is cholesterol?
| 1. | Triglyceride | 2. | Phospholipid |
| 3. | Unsaturated fat | 4. | Steroid |
Subtopic: Lipids |
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Which of the following is most likely to lead to the denaturation of proteins?
1. Hydrophobic interactions
2. Heat
3. Hydrogen bonding
4. Low temperature
1. Hydrophobic interactions
2. Heat
3. Hydrogen bonding
4. Low temperature
Subtopic: Proteins | Enzymes |
90%
From NCERT
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Which of the following secondary metabolites is an important anti-cancer drug?
1. Abrin
2. Concanavalin A
3. Codeine
4. Vincristine
1. Abrin
2. Concanavalin A
3. Codeine
4. Vincristine
Subtopic: Primary & Secondary Metabolites |
66%
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What is a prosthetic group in the context of proteins?
| 1. | A protein fragment that is temporarily associated with a biomolecule. |
| 2. | An inorganic ion that temporarily binds to enzymes to activate them. |
| 3. | A non-proteinaceous unit permanently attached to proteins that is essential for their function. |
| 4. | A secondary structure element that provides stability to proteins. |
Subtopic: Enzyme Cofactors |
71%
From NCERT
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Which of the following biomolecules has the most C-H bonds [Assume all have the same number of carbon atoms in their structure]?
1. an unsaturated fatty acid
2. a polyunsaturated fatty acid
3. a monosaccharide
4. a saturated fatty acid
1. an unsaturated fatty acid
2. a polyunsaturated fatty acid
3. a monosaccharide
4. a saturated fatty acid
Subtopic: Element Analysis |
64%
From NCERT
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Inhibition of succinic dehydrogenase by malonate is an example of:
1. Competitive inhibition
2. Non-competitive inhibition
3. Un-competitive inhibition
4. Allosteric feedback inhibition
1. Competitive inhibition
2. Non-competitive inhibition
3. Un-competitive inhibition
4. Allosteric feedback inhibition
Subtopic: Enzyme Inhibition |
91%
From NCERT
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Almost all enzymes are proteins but a few may be:
| 1. | nucleic acids | 2. | carbohydrates |
| 3. | lipids | 4. | metal ions |
Subtopic: Enzymes |
80%
From NCERT
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