protein
Carbohydrates do not function as a builder of body tissue. While they are a source of energy for the body, carbohydrates are primarily used for fuel rather than for building and repairing tissues. Proteins are the main nutrient class responsible for building body tissues.
Enzymes
The class of nutrient that is necessary for production of certain hormones and that forms a coating on nerves is
umm.....
Enzymes belong to the class of proteins, which are biological macromolecules. Starches belong to the class of carbohydrates, another type of biological macromolecule.
Hydrolytic enzymes that break down proteins are a class of enzymes called proteases.
I believe it is protien.
photosynthesis
Proteins i think.
One class of enzymes that perform these tasks are called Luciferins.
The main class of enzymes that the enzyme that catalyzes the conversion of lactose to galactose and glucose belongs to hydrolase. One example of a reaction of hydrolase is ser to ala which equals ser plus ala.
fat