Which of the following is true about protein molecules? a. protein molecules are made up of strands of dna joined together by amino acid sequences. b. protein molecules have many functions in the body, including the storage of genetic information. c. the sequence of amino acids that make up a protein molecule do not affect its function. d. the shape and folded structure of a protein molecule are important in determining its function.

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.