Questions: All of the following are lipids except . cholesterol triglyceride phospholipid wax starch

The answer is the last one: starch.

Explanation for each option:

1. Cholesterol: Cholesterol is a type of lipid known as a sterol. It is an essential component of cell membranes and a precursor for the synthesis of steroid hormones, bile acids, and vitamin D.

2. Triglyceride: Triglycerides are a type of lipid composed of one glycerol molecule and three fatty acids. They are the main form of stored energy in animals and are found in fats and oils.

3. Phospholipid: Phospholipids are a class of lipids that contain a phosphate group. They are a major component of cell membranes, forming the lipid bilayer.

4. Wax: Waxes are a type of lipid that are esters of long-chain fatty acids with long-chain alcohols. They are used by plants and animals for protection and waterproofing.

5. Starch: Starch is a carbohydrate, not a lipid. It is a polysaccharide composed of glucose units and is used by plants as a form of energy storage.

Summary: Starch is not a lipid; it is a carbohydrate. Therefore, the correct answer is starch.