Question

A phosphoglyceride consists of
A.Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
B.A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
C.A saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule.
D.Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.

Answer 1

Lipids are the macromolecules that are normally water insoluble in nature. They are fatty acids, glycerol, esters of fatty acids and glycerol or even be sterols that are characterised by their cyclic structures and hydroxyl groups in it.

Complete answer:
We know that there are several molecules in our body that are made up of lipids. They are of several types based on their structure.
Fatty acids are the form of lipids that contain long chain carboxylic acids in it. Examples are stearic acid and palmitic acid.
Glycerols are also called trihydric alcohol as they contain three hydroxyl groups in it.
Fatty acids and glycerols can be esterified to produce several esters. Hydroxy groups of glycerols can react with carboxyl groups of fatty acid to form esters. They can be monoglyceride, diglyceride and triglyceride based on the number of fatty acid molecules.
Lipids that have a phosphate group attached to a diglyceride is called phospholipids. Know that phospholipids that are derived from glycerides are called phosphoglycerides.
It contains a phosphate group attached to a glycerol molecule which is esterified with a fatty acid. Note that these fatty acids can be both saturated or unsaturated.

Hence the correct answer is OPTION(B)

Note: Cell membrane is made up of phospholipids which is arranged as a bilayer. It contains a special phospholipid called lecithin. Know that with the help of these molecules, the cell membrane has two sides. Outer part is hydrophilic and the inner part is hydrophobic in nature. It helps to protect nonpolar tails of hydrocarbons from aqueous environment.