Enzymes are proteins that speed up chemical reactions in the body how do they work a. they increase the surface area of reactants b. they increase the concentration of reactants c. they decrease the concentration of products d. they act as reactants

The answer would be D, Enzymes are soluble protein molecules that can speed up chemical reactions in cells. These reactions include respiration, photosynthesis and making new proteins. For this reason enzymes are sometimes called biological catalysts.

Answer is to avoid experimental error