Step 1: Understand what a lipid is. Lipids are a group of organic compounds that are insoluble in water but soluble in organic solvents.
Step 2: Identify the options given in the question. The options are cholesterol, starch, cellulose, and glucose.
Step 3: Recognize that cholesterol is a type of lipid. It is a fat molecule that is important for cell membranes and hormone production.
Step 4: Know that starch, cellulose, and glucose are types of carbohydrates. They are sugars or polysaccharides that provide energy and structure to cells.
Step 5: Conclude that among the options, cholesterol is the only lipid.
