Shrimp that live in the cold waters off alaska
will die if introduced into warm water. one likely
reason these shrimp do not survive is that
enzymes in the shrimp
(1) start to replicate
(2) change shape
(3) are composed of fat molecules that melt
(4) break down into small starch molecules

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.