Which type of test is used to determine whether disinfectant solutions actively used in a clinical setting are being used correctly?
disk-diffusion assay
phenol coefficient test
in-use test
use-dilution test

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: