NEET 2012 Biology question

Which one of the following biomolecules is **correctly** characterised ?

(1)Alanine amino acid - Contains an amino group and an acidic group anywhere in the molecule
(2)Lecithin - a phosphorylated glyceride found in cell membraneCorrect
(3)Palmitic acid - an unsaturated fatty acid with 18 carbon atoms
(4)Adenylic acid - adenosine with a glucose phosphate molecule

Answer: (2)

Solution

Lecithin is a phosphoglyceride (phospholipid): glycerol esterified with two fatty acids and a phosphate group linked to choline; it is a major component of cell membranes. Hence (2). (1) wrong: in an amino acid the amino and carboxyl groups are attached to

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Question ID VK-091018