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 |
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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%
From NCERT
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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%
From NCERT
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The substrate has to go through a much higher energy state or transition state in case of:

1. Exothermic reactions only

2. Endothermic reactions only

3. Both exothermic and endothermic reactions

4. Neither exothermic nor endothermic reactions

Subtopic:  Mechanism of Enzymes |
 56%
From NCERT
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When the co-factor is removed from the enzyme, the catalytic activity:

1. is lost.

2. is reduced.

3. is increased.

4. is unaffected.

Subtopic:  Enzyme Cofactors |
 66%
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What is the term used for a protein molecule that assists in the proper folding of other proteins?

1. ubiquitin

2. chaperonin

3. vimentins

4. cyclins

Subtopic:  Proteins |
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Locomotion is a very important feature in animals. Considering the frequent need for locomotion in animals, an animal would obtain the greatest benefit from storing its energy as:

1. proteins

2. minerals

3. carbohydrates

4. fats

Subtopic:  Lipids |
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In an average composition of a cell, the maximum % of total cellular mass [after water and protein] is constituted by:

1. Carbohydrates

2. Lipid

3. Nucleic acids

4. Ions

Subtopic:  Introduction |
 63%
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