The enzyme catalase has a specific substrate (hydrogen peroxide) that can fit into its active site. Proteins cannot fit into the active site because it's shape is different than the "puzzle piece" hole of the active site that only hydrogen peroxide can fit in. Hope this helps!
The law of conservation of energy is a law of science that states that energy cannot be created or destroyed, but only changed from one form into another or transferred from one object to another. Hope it helps
