The essential chemical components of many coenzymes are

1. Proteins

2. Nucleic acids

3. Carbohydrates

4. Vitamins

Subtopic:  Enzyme Cofactors |
 63%
From NCERT
NEET - 2013
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Given below is the diagrammatic representation of one of the categories of small

molecular weight organic compounds in the living tissues. Identify the category shown

and the one blank component X in it

Category              Component

1. Cholesterol       Guanin

2. Amino acid       NH2

3. Nucleotide        Adenine

4. Nucleoside       Uracil

Subtopic:  Nucleic Acid: Nucleotides | Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
 67%
From NCERT
NEET - 2012
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Which one is the most abundant protein in the animal world?

1. Trypsin                     

2. Haemoglobin

3. Collagen                   

4. Insulin

Subtopic:  Proteins | Introduction |
 94%
From NCERT
NEET - 2020
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Which one out of A-D given below correctly represents the structural formula of the basic amino acid?

1. C

2. D

3. A

4. B

Subtopic:  Different Amino Acids | Introduction to Proteins |
NEET - 2012
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Which one of the following structural formulae of two organic compounds is correctly

identified with its related function?

1. A - triglyceride major - a source of energy

2. A - Lecithin - a component of cell membrane 

3. B - Adenine - forms nucleotides of the nucleic acids

4. Both 2. and 3.

Subtopic:  Double Helix : Watson & Crick Part 1 | Lipids: Glycerolipids, Phospholipids & Glycerol | Double Helix : Watson & Crick |
 57%
From NCERT
NEET - 2011
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Which one of the following pairs is wrongly matched?

1. Detergents - Lipase

2. Alcohol - Nitrogenase

3. Fruit juice - Pectinase

4. Textile - Amylase

Subtopic:  Enzymes Classification |
 68%
NEET - 2009
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Carbohydrates are commonly found as starch in plant storage organs. Which of the

following five properties of starch (A-E) make it useful as a storage material?

(A) Easily translocated 

(B) Chemically non-reactive

(C) Easily digested by animals

(D) Osmotically inactive

(E) Synthesized during photosynthesis

The useful properties are 

1. (B) and (C)

2. (B) and (D)

3. (A), (C) and (E)

4. (A) and (E)

Subtopic:  Carbohydrates |
 51%
NEET - 2008
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Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched

with the category mentioned against it?

1. Thymine, Uracil         - Pyrimidines

2. Uracil, Cytosine         - Pyrimidines

3. Guanine, Adenine      - Purines

4. Adenine, Thymine     - Purines

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
 80%
From NCERT
NEET - 2008
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A competive inhibitor of succinic dehydrogenase is

1. malonate                 

2. oxaloacetate

3. α-ketoglutarate       

4. malate

Subtopic:  Enzyme Inhibition: Introduction | Enzyme Inhibition |
 86%
From NCERT
NEET - 2008
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An organic substance bound to an enzyme and essential for its activity is called:

1. coenzyme                   

2. holoenzyme

3. apoenzyme                 

4. isoenzyme

Subtopic:  Enzyme Cofactors |
 76%
From NCERT
NEET - 2006
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