One benefit to scientific use of SI units (or International System of Units) is that they are universal - which means that the same type of units is used everywhere in the world. America is one of the rare countries that doesn't use it, which may impede understanding.
1)Enzyme is a protein. The main material of an enzyme is protein
2)It is easily influenced, by environmental change. Environmental factors include temperature, pH, and inhibitor.
3)It acts as catalyst The enzyme functions in accelerating chemical reaction, but the enzyme itself does not change after the reaction ends.
