BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Catalase is a key enzyme which uses hydrogen peroxide, a nonradical ROS, as its substrate.

Detailed explanation-2: -Hydrogen peroxide is a substrate or side-product in many enzyme-catalyzed reactions. For example, it is a side-product of oxidases, resulting from the re-oxidation of FAD with molecular oxygen, and it is a substrate for peroxidases and other enzymes.

Detailed explanation-3: -When the enzyme catalase comes into contact with its substrate, hydrogen peroxide, it starts breaking it down into water and oxygen.

Detailed explanation-4: -The enzyme catalase quickly breaks down hydrogen peroxide into water and oxygen.

Detailed explanation-5: -catalase, an enzyme that brings about (catalyzes) the reaction by which hydrogen peroxide is decomposed to water and oxygen.