What are the main functions of carbohydrates? A. Structural, makeup of enzymes and many other structures

B. Storage and transfer of genetic information from cell to cell

C. Storage of energy and form a bilayer of the cell membrane

D. Structure in a cell wall and main source of quick energy to fuel cellular processes

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.