The tertiary structure of proteins can be destroyed by
1. High energy radiations 
2. High temperature
3. Drastic changes in pH
4. All of these

Subtopic:  Enzymes |
 85%
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Select the false statement.
1. Artificial silk is a polysaccharide
2. Natural silk is a protein
3. collagen proteins forms  intercellular ground substance
4. Plant proteins are first class proteins
 
Subtopic:  Proteins |
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Select the option that represents aromatic amino acid?
1. S
2. Y 
3. C 
4. E
 
Subtopic:  Proteins |
 51%
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Beta Pleated structure in a protein is associated with which level of structure organisation?
1. Primary
2. Secondary
3. Tertiary
4. Quaternary
Subtopic:  Proteins |
 82%
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Unsaturated fats are made saturated by 
1. Polymerisation
2. Dehydrogenation
3. Hybridisation 
4. Hydrogenation
 
Subtopic:  Lipids |
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Arachidonic acid has
1. 20 carbons excluding carboxyl carbon
2. 20 carbons including carboxyl carbon
3. 16 carbons excluding carboxyl carbon
4. 16 carbons including carboxyl carbon
Subtopic:  Lipids |
 86%
From NCERT
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Lecithin is 
1. Simple lipid
2. Derived lipid
3. Phospholipid 
4. Steroids
 
Subtopic:  Lipids |
 89%
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Basic unit of a nucleic acid is
1. pentose sugar 
2. Phosphoric acid
3. Nucleotide
4. All of these
Subtopic:  Nucleic Acid |
 54%
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Which of the following statements is incorrect
1. Lipids are strictly macromolecules
2. Palmitic acid has 16 carbons including carboxyl carbon
3. Oils have low melting point and hence remain as liquids in winters
4. Arachidonic acid is an unsaturated fatty acid
Subtopic:  Introduction |
 77%
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Which one is the correct base pairing for DNA molecules?
1. Cytosine  - Uracil
2. Thymine  - Guanine
3. Thiamine  - Adenine
4. Cytosine  - Guanine
Subtopic:  Nucleic Acid |
 60%
From NCERT
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