Two free ribonucleotide units are interlinked with

1. Peptide bond

2. Covalent bond

3. Hydrogen bond

4. Phosphodiester bond

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
 67%
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Genes are packaged into a bacterial chromosome by                           [1997]

1. Histones

2. Basic proteins

3. Acidic proteins

4. Actin

Subtopic:  Proteins |
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Lactose is composed of                      [1998]

1. Glucose+Glucose

2. Glucose+Fructose

3. Fructose+Galactose

4. Glucose+Galactose

Subtopic:  Carbohydrates: Glycosidic Bond & Disaccharide |
 75%
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In which of the following groups, all the three are examples of polysaccharides?           

1. Starch, glycogen, cellulose

2. Sucrose, maltose, glucose

3. Glucose, fructose, lactose

4. Galactose, starch, sucrose 

Subtopic:  Carbohydrates: Starch & Glycogen | Carbohydrates: Cellulose, Chitin, Inulin & Agar |
 82%
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Km value is dependent upon

1. Temperature

2. Substrate concentration

3. Enzyme concentration

4. All of the above

Subtopic:  Properties of Enzymes |
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Most abundant organic compound on earth is                     [2001,2004]

1. Protein

2. Cellulose

3. Lipids

4. Steroids

Subtopic:  Introduction |
 65%
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To which of the following family do folic acid and pantothenic acid belong? 

1. Vitamin-C

2. Vitamin-K 

3. Vitamin-A

4. Vitamin-B complex

Subtopic:  Enzyme Cofactors |
 64%
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Which one of the following amino acids is an essential part of human diet ?

1. Glycine

2. Phenylalanine

3. Serine

4. Aspartic acid

Subtopic:  Amino Acids |
 50%
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Which one of the following pairs is not correctly matched?

1. Vitamin B12 - Pernicious anaemia

2. Vitamin-B1Beri-beri

3. Vitamin-C - Scurvy

4. Vitamin B2 -  Pellagra

Subtopic:  Enzyme Cofactors |
 65%
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Select the option which is not correct with respect to enzyme action.

1. Substrate binds with enzyme as its active site

2. Addition of lot of succinate does not reverse the inhibition of succinic dehydogenase by malonate.

3. A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate

4. Malonate is a competitive inhibitor of succinic dehydrogenase

Subtopic:  Enzyme Inhibition: Introduction | Enzyme Inhibition |
 68%
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