The energy animals need for their life functions is released when their cells carry out which of the following functions? A) Breaking down glucose B)Absorbing water from the environment
C)Moving molecules across membrane
D)Eliminating waste products

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.