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 |
From NCERT
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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 |
 83%
From NCERT
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All the following are nucleosides except:

1. Adenosine

2. Cytosine

3. Guanosine

4. Uridine

 

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
 58%
From NCERT
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Which of the following secondary metabolites is an anticancer drug?

1.  Vinblastin

2.  Concanavalin A

3.  Abrin

4.  Ricin

Subtopic:  Primary & Secondary Metabolites |
 77%
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 |
 87%
From NCERT
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At each step of its ascent, the DNA strand turns:

1. 3.4°

2. 34°

4. 3.6°

4. 36°

Subtopic:  Double Helix : Watson & Crick Part 2 | Double Helix : Watson & Crick |
 59%
From NCERT
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The blood concentration [in mM] of glucose in a normal healthy individual is:

1.  4.5-5.0

2.  5.0-5.5

3.  5.5-6.0

4.  6.0-6.5

 74%
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 |
 64%
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 |
 78%
From NCERT
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Subtopic:  Primary & Secondary Metabolites |
 69%
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