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Question:

A phosphoglyceride is always made up of a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.

Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.

A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.

Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.

A saturated or unsaturated fatty acid esterified to phosphate group which is also attached to a glycerol molecule.

Solution:

Phosphoglycerides are glycerol-based phospholipids. The alcohol here is glycerol, to which two fatty acids (either saturated or unsaturated) and a phosphoric acid are attached as esters. Thus, the correct answer is option B.