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 |
 51%
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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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About 98% of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and:

(1) Phosphorous and sulphur

(2) Sulphur and magnesium

(3) Magnesium and sodium

(4) Calcium and phosphorous

Subtopic:  Introduction |
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In non-competitive inhibition:

1. the substrate and inhibitor cannot bind to the enzyme at the same time

2. the inhibitor binds only to the substrate-enzyme complex

3. the inhibitor can bind to the enzyme at the same time as the enzyme's substrate

4. the binding of the inhibitor to the enzyme reduces its activity but does not affect the binding of substrate

Subtopic:  Enzyme Inhibition |
 54%
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Which of the following elements is present in higher proportion [% weight of the total] in Earth's crust with respect to the average composition of a human body?

1. Carbon

2. Nitrogen

3. Sulfur

4. Magnesium

Subtopic:  Introduction |
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Identify the amino acid with hydroxymethyl as its R group:

1. Glycine

2. Alanine

3. Serine

4. Phenylalanine

Subtopic:  Different Amino Acids |
 77%
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All of the following are nucleosides, except:

1. Adenosine 2. Cytosine
3. Guanosine 4. Uridine
Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
From NCERT
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Identify the incorrect statement regarding the structure of proteins:

1. They are heteropolymers containing strings of amino acids.
2. The first amino acid in the primary structure is the N-terminus amino acid
3. Only left helices are observed in proteins
4. Tertiary structure is absolutely essential for many biologic functions of the proteins
Subtopic:  Structural Organisation of Proteins |
 82%
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At each step of its ascent, the DNA strand turns:

1. 3.4°

2. 34°

3. 3.6°

4. 36°

Subtopic:  Double Helix : Watson & Crick Part 2 | Double Helix : Watson & Crick |
 51%
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