Final answer:
Lipids are the biomolecules that are never found in a polymeric form. Unlike carbohydrates, proteins, and nucleic acids, which form long polymer chains, lipids exist as individual molecules or complex structures and do not form polymers. The option (C) is correct.
Step-by-step explanation:
Among the four major classes of biomolecules, lipids are the ones that are never found in a polymeric form like the others. Carbohydrates, proteins, and nucleic acids all form long chains, or polymers, through dehydration synthesis reactions, where monomers are linked together by the loss of a water molecule. Lipids, on the other hand, do not form such polymers and instead exist as individual molecules or are assembled into complex structures like cell membranes without forming polymer chains.
The two types of macromolecules that are the main components of myelin are lipids and proteins. Myelin is the insulating layer that surrounds nerves, including those in the brain and spinal cord, aiding in the efficient transmission of electrical signals.
Carbohydrates are important macromolecules that serve as a vital energy source and provide structural support to various organisms. Polysaccharides such as starch and cellulose are examples of carbohydrates that are polymers made up of monosaccharide monomers linked by glycosidic bonds. Therefore, option (C) is correct.