Enzymes, vitamins and hormones can be classified into a single category of biological chemicals because of all of these

Step-by-step solution

Enzymes are protein that, in small amounts, speed up the rate of a biological reactions and help in regulating metabolism. Hormones are also metabolic regulator and help in stimulation or inhibition of one or more physiological processes. Vitamines are accessory food factors which are required in small quantity for controlling metabolism and body functioning.