simple lipid molecule that consists mainly of chains of carbon and hydrogen atoms and that may exist alone or as a monomer of larger lipid molecules type of anaerobic respiration that includes glycoly...simple lipid molecule that consists mainly of chains of carbon and hydrogen atoms and that may exist alone or as a monomer of larger lipid molecules type of anaerobic respiration that includes glycolysis followed by the conversion of pyruvic acid to one or more other compounds and the formation of NAD + type of connective tissue that is found in skin, tendons, and ligaments and that is composed of parallel bundles of collagen fibers, making it tough and elastic