The type of biochemical reaction shown in the figure is catalysed by a group of enzymes called as:
1. Transferases 2. Lyases
3. Ligases 4. Oxidoreductases

Subtopic:  Enzymes Classification |
 82%
Level 1: 80%+
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Identify the incorrect statement:
1. Cytosine is common for both DNA and RNA.
2. Uracil is present in RNA at the place of Thymine.
3. A nitrogenous base is linked to the OH of 1'C pentose sugar through a N-glycosidic linkage to form a nucleoside.
4. When a phosphate group is linked to OH of 2'C of a nucleoside through phosphoester linkage, a corresponding nucleotide is formed.
Subtopic:  Nucleic Acid: Nucleotides |
 77%
Level 2: 60%+
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All the following biomolecules can be called both polymers and macromolecules except:
1. Lipids
2. Proteins
3. Carbohydrates
4. Nucleic acids
Subtopic:  Lipids |
 88%
Level 1: 80%+
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Which of the following secondary metabolites is a carbohydrate-binding protein [Lectin]?
1. Abrin
2. Vinblastin
3. Curcumin
4. Concanavalin A
Subtopic:  Primary & Secondary Metabolites |
 89%
Level 1: 80%+
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Identify the amino acid:
1. Glycine 2. Serine
3. Alanine 4. Lysine
Subtopic:  Amino Acids |
 88%
Level 1: 80%+
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The activator of alcohol dehydrogenase enzyme is:
1. Zinc 2. Magnesium
3. Manganese 4. Molybdenum
Subtopic:  Enzyme Cofactors |
 71%
Level 2: 60%+
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Consider the two statements:
Assertion (A): Iodine-KI reagent can be used to detect starch in a sample.
Reason (R): Starch can hold iodine molecules in its helical portion and starch-iodine is blue in colour.
 
1. Both (A) and (R) are True but (R) does not correctly explain(A).
2. (A) is True but (R) is False.
3. Both (A) and (R) are False.
4. Both (A) and (R) are True and (R) correctly explains (A).
Subtopic:  Carbohydrates: Starch & Glycogen |
 76%
Level 2: 60%+
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In the absence of an enzyme, the catalysed reaction:
1. does not take place
2. takes place at a very slow rate
3. takes place at a higher rate
4. is not affected at all
Subtopic:  Enzymes | Enzyme Catalysis |
 84%
Level 1: 80%+
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DNA does not contain:
1. Thiamine
2. Adenine
3. Cytosine
4. Guanine

Subtopic:  Nucleic Acid | The DNA |
 83%
Level 1: 80%+
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Which of the following is a heteropolymer?
1. Starch 2. Cellulose
3. Glycogen 4. Insulin
Subtopic:  Proteins |
 72%
Level 2: 60%+
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