If a bacterium is to a drug, then that drug can be used to treat bacterial infection Resistant
Neutral
Aseptic
Sensitive

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

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.

Achange in which factor will affect the rate of reaction only when gases are involved? temperature pressure surface area concentration