Regarding polysaccharides:
I:
Cellulose does not contain complex helices.
II:
Inulin is a polymer of fructose.
III:
Left end of glycogen is the reducing end
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Â Carbohydrates |Â Carbohydrates: Starch & Glycogen |Â Carbohydrates: Cellulose, Chitin, Inulin & Agar |
 71%
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An enzyme catalysed reaction is running optimally at 40oC. If the temperature is reduced to 20oC, the rate of reaction is expected to:
| 1. | Double | 2. | Half |
| 3. | Increase four time | 4. | Reduce to a quarter |
Subtopic: Â Factors Affecting Enzyme Catalysis Reaction |
 50%
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Identify the incorrect statement:
| 1. | Zinc is a cofactor for carboxypeptidase |
| 2. | NADP contains the vitamin cyanocobalamin |
| 3. | Malonate is a competitive inhibitor of Succinic dehydrogenase |
| 4. | Haem is the prosthetic group in peroxidise |
Subtopic: Â Enzyme Cofactors |
 82%
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Which biomolecule makes up maximum percent of the total cellular mass in an average cell?
1. Proteins
2. Carbohydrates
3. Lipids
4. Nucleic acids
1. Proteins
2. Carbohydrates
3. Lipids
4. Nucleic acids
Subtopic: Â Introduction |
 78%
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The number of:
| 1. | Aromatic proteinogenic amino acids is 5 |
| 2. | Carbon atoms in arachidonic acid including carboxyl carbon is 20 |
| 3. | Fatty acids in cholesterol is 3 |
| 4. | Polypeptide chains in quaternary structure of haemoglobin is 2 |
Subtopic: Â Lipids: Glycerolipids, Phospholipids & Glycerol |
 86%
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All enzymes are:
1. Proteins
2. Thermostable
3. Capable of speeding up a biochemical reaction
4. Capable of working in alkaline pH
1. Proteins
2. Thermostable
3. Capable of speeding up a biochemical reaction
4. Capable of working in alkaline pH
Subtopic: Â Enzymes |Â Factors Affecting Enzyme Catalysis Reaction |
 59%
From NCERT
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A secondary metabolite, produced by castor oil plant, that is a highly potent toxin is:
1. Morphine
2. Concanavalin A
3. Ricin
4. Vinblastin
1. Morphine
2. Concanavalin A
3. Ricin
4. Vinblastin
Subtopic: Â Primary & Secondary Metabolites |
 83%
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Which of the following amino acids is not an aromatic amino acid?
1. Tyrosine
2. Tryptophan
3. Threonine
4. Phenylalanine
1. Tyrosine
2. Tryptophan
3. Threonine
4. Phenylalanine
Subtopic: Â Amino Acids |
 83%
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The number and linear sequence of amino acids in a protein are considered as 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
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: Â Proteins |
 90%
From NCERT
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Regarding factors affecting enzyme activity:
| I: | Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity. |
| II: | With the increase in substrate concentration, the velocity of the enzymatic reaction rises at first. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Â Factors Affecting Enzyme Catalysis Reaction |
 86%
From NCERT
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