Question

Which biomolecule is correctly characterised?

• A. Lecithin - Phosphorylated glyceride found in cell membrane
• B. Palmitic Acid - An unsaturated fatty acids with $18$ carbon atoms
• C. Adenylic Acid - Adenosine with glucose phosphate molecule
• D. Alanine Amino Acid - Contains an amino group and an acid group anywhere in the molecule

Answer 1

Answer: (A)

Lecithin - Phosphorylated glyceride found in cell membrane

• Lecithins are mixtures of glycerophospholipids that form the framework of cells. They are composed of a molecule of glycerol, a phosphate group, two fatty acids, and a nitrogen-containing base such as choline attached to a phosphate group. They are found in many foods such as soybean and egg yolk. They are also found in nervous tissue especially myelin sheath and plant and animal, cell membranes.
• Palmitic acid is a saturated fatty acid with 16 carbon atoms.
• Adenylic acid is a nucleotide also called adenosine monophosphate. It is made up of ribose sugar, a phosphate group, and a nitrogen-containing base adenine.
• Alanine is a neutral amino acid with an alkyl group replaced by a methyl group. It contains a central carbon atom bonded to the amine group, carboxylic acid group, hydrogen, and methyl group.

Thus, the correct answer is option A.