Which of the following correctly applies to a catalyst? a. They do not actually participate in the chemical reaction and therefore are unchanged at the end of the reaction. b. They provide an alternate lower energy mechanism by which the reaction proceeds. c. They must be in the same phase as the reactants in the chemical reaction. d. Biological catalysts are proteins called substrates.

option B) They provide an alternate lower energy mechanism by which the reaction proceeds

Explanation:

Catalyst are involved in chemical reaction increasing the rate they occur by lowering the activation energy found in the bound- reactants complex.

The reaction moves forward because the lower energy mechanism when catalyst are added allows for a more easily splitted bond, thus, allowing the formation of products.

clouds form

solid ice forms on leaves.

water droplets form on grass.