Which of the following is true about Cholesterol?

1. It contains four fused hydrocarbon rings

2. Organic molecule

3. Hydroxyl group is present

4. All of these

The molecule that provides stability to cell membrane is

Which of the following is diagrammatic representation of phospholipid (lecithin)?

Which one of the following biomolecules is correctly characterized?

1. Lecithin – a phosphorylated glyceride found in cell membrane

2. Palmitic acid – an unsaturated fatty acid with 18 carbon atoms

3. Adenylic acid – adenosine with a glucose and phosphate molecule

4. Alanine amino acid – contains an amino group and an acidic group anywhere in the molecule

Lecithin is formed by 

1. Fatty acid (2) + Phosphoric acid (1) + Ethanolamine 

2. Fatty acid (2) + Phosphoric acid (1) + Serine

3. Fatty acid (3) + Glycerol

4. Glycerol (1) + Fatty acid (2) + Phosphoric acid (1) + Choline