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 |
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Calcium deficiency occurs in the absence of vitamin

1. D

2. C

3. E

4. B

 71%
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Which one of the following is a fat-soluble vitamin and it's related deficiency disease? 

1. Ascorbic acid     - Scurvy

2. Retinol              - Xerophthlmia

3. Cobalamine       - Beri-beri

4. Calciferol          - Pellagra

 59%
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Which one is correctly matched ? 

1. Vit-E-Tocopherol

2. Vit-D-Riboflavin

3. Vit-B-Calciferol

4. Vit-A-Thiamine

 55%
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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 |
 67%
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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 |
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 |
 77%
From NCERT
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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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