A triacylglycerol consists of glycerol and three fatty acids. A glycerophospholipid is different in that it also consists of glycerol but has two fatty acids. The hydroxyl group on its third carbon is attached by a phosphate bond to ___ , which is attached by a phosphate ester bond to an ionized amino alcohol.

The correct answer is: Phosphoric acid

Explanation:

Lipids are the non-polar biomolecules that are insoluble in water but soluble in organic solvents.

Triacylglycerol, also known as triglycerides, are the simple lipids that are composed of glycerol and three fatty acids. They are the fatty acid triesters of glycerol.

Glycerophospholipids are the compound or complex lipids, that are composed of glycerol, two fatty acids and a phosphate group esterified to an amino alcohol.

In this molecule, two carbon atoms of glycerol molecule are attached to fatty acids by ester linkages.

Whereas, the third carbon of the glycerol molecule is attached to an amino alcohol by a phosphodiester bond. In other words, the third carbon of glycerol is attached to phosphoric acid by a phosphate bond, which is further attached an amino alcohol by a phosphate ester bond.

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