Final answer:
Starch is not a lipid, it is a complex carbohydrate. Starch is not a lipid; it is a carbohydrate consisting of glucose units. Lipids are water-insoluble compounds like cholesterol, earwax, and saturated fats.
Step-by-step explanation:
A lipid is a member of a class of water-insoluble compounds that includes oils, fats, and waxes. The three options A, C, and D are all lipids. Cholesterol (option A) is a type of steroid and is considered a lipid. Earwax (option C) is made up of lipids and other substances. Saturated fats (option D) are types of lipids that consist of triglycerides with carbon chains consisting entirely of carbon-carbon single bonds. Therefore, the correct answer is B. Starch is not a lipid, it is a complex carbohydrate.
Starch is not a lipid; it is a carbohydrate consisting of glucose units. Lipids are water-insoluble compounds like cholesterol, earwax, and saturated fats.
The substance among the given options that is not a lipid is starch. Lipids are a group of water-insoluble compounds that include fats, oils, and waxes. Cholesterol is classified as a steroid, which is a type of lipid. Earwax is composed of lipids including a mixture of saturated and unsaturated long-chain fatty acids, alcohols, squalene, and cholesterol. Saturated fats are lipids that have fatty acid chains with all carbon atoms connected by single bonds.
Starch, however, is a polysaccharide composed of glucose units and is classified as a carbohydrate, not a lipid. It functions as a storage form of energy in plants and is water-soluble, which is a characteristic distinct from lipids.