Which one of the following is a fat-soluble vitamin and its related deficiency disease?

1. Ascorbic acid - Scurvy

2. Retinol - Xerophthalmia

3. Cobalamine - Beri-Beri

4. Calciferol - Pellagra

Subtopic:  Enzyme Cofactors |
 61%
AIPMT - 2007
Please attempt this question first.
Hints

Many elements are found in living organisms either free or in the form of compounds. Which one of the following is negligible in living organisms?

1. Silicon

2. Magnesium

3. Iron

4. Sodium

Subtopic:  Introduction |
 82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Which of the following represents uridylic acid?

1. Uracil + Ribose

2. Uridine + Phosphoric acid

3. Uracil + Phosphoric acid

4. Uridine + Ribose + Phosphoric acid

Subtopic:  Nucleic Acid |
 55%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

The statement "All biological catalysts are proteins" is no longer valid after the discovery of:

1. ribonuclease

2. ribozyme

3. RNAs

4. DNAs

Subtopic:  Enzymes |
 84%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Given below is the chemical formula of:

1. Palmitic acid

2. Glycerol

3. Galactose

4. Stearic acid

Subtopic:  Lipids |
 85%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Jacob and Monod named some enzymes as allosteric whose activity is regulated by:

1. End product

2. Substrate

3. By product

4. Coenzyme

Please attempt this question first.
Hints

Apoenzyme is:

1. protein

2. carbohydrate

3. vitamin

4. amino acid

Subtopic:  Enzyme Cofactors |
 81%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

An example of competitive inhibition of an enzyme is the inhibition of:

1. succinic dehydrogenase by malonic acid

2. cytochrome oxidase by cyanide

3. hexokinase by glucose-6-phosphate

4. carbonic anhydrase by carbon dioxide

Subtopic:  Enzyme Inhibition |
 83%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Which one out of (a) to (d) given below correctly represents the structural formula of the basic amino acid?

 

Subtopic:  Amino Acids |
 63%
Please attempt this question first.
Hints

Which one of the following structural formulas of two organic compounds is correctly identified along with its related function? 
1. B-uracil - a component of DNA
2. A-triglyceride- a major source of energy
3. A-lecithin - a component of cell membrane
4. B-adenine- a nucleotide that makes up nucleic

Subtopic:  Lipids |
 87%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.