The substances necessary for the synthesis of most materials in an organism are biomolecules, that are required to perform biological functions.
The hormones act as messengers and are secreted in blood directly. The carbohydrates are the sugars and provide energy to the body. The antibodies works in protecting the body against pathogen. The enzymes are the catalyst that require substrate for their function. Almost all the metabolic process in the body for synthesis of any substance requires enzymes. Thus, option D is correct.
