The antepartum nurse is caring for a patient with a family history of neural tube defects. the patient declines genetic counseling after listening to the health care provider's explanation. which nursing intervention is appropriate for this patient

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.