AP BIOLOGY

Detailed explanation-1: -Cholesterol, triglycerides, and high-density lipoproteins are important constituents of the lipid fraction of the human body.

Detailed explanation-2: -Lipid is another name for fat, so ‘lipoprotein’ means fat plus protein. LDL cholesterol and HDL cholesterol are the two main types of lipoprotein, but there are other types too.

Detailed explanation-3: -Examples of lipids include fats, oils, waxes, certain vitamins (such as A, D, E and K), hormones and most of the cell membrane that is not made up of protein.

Detailed explanation-4: -Some examples of lipids include butter, ghee, vegetable oil, cheese, cholesterol and other steroids, waxes, phospholipids, and fat-soluble vitamins. All these compounds have similar features, i.e. insoluble in water and soluble in organic solvents, etc.