Question

In cells, hydrogen peroxide is converted to water and oxygen through the activity of A) enzymes. B) fats. Eliminate C) lipases. D) pigments

Answer 1

a) enzymes 
Enzymes are catalysts which aid in speeding up chemical reactions (for example, breaking down hydrogen peroxide into water and oxygen). 

Answer 2

enzymes are proteins that can convert harmful substance, like hydrogen peroxide, into harmless substances, like water and oxygen. Enzyme activity often occurs in organelles called lysosomes, as shown in the diagram of the cell.