Which structure level enables proteins to function as enzymes

Which structural level enables the proteins to function as enzymes ?

Which structural make up enables the protein to become functional enzymes?

Proteins perform many physological functions. For example, some proteins function as enzymes. One of the following represents an additional function that some proteins perform

Proteins perform many physological functions. For example, some proteins function as enzymes. One of the following represents an additional function that some proteins perform

Proteins perform many physological functions. For example, some proteins function as enzymes. One of the following represents an additional function that some proteins perform

Proteins perform many physological functions. For example, some proteins function as enzymes. One of the following represents an additional function that some proteins perform

Proteins perform many physological functions. For example, some proteins function as enzymes. One of the following represents an additional function that some proteins perform

Part of enzyme which combines with non-protein part to form fuctional enzymes is

Part of enzyme which combines with non-protein part to form fuctional enzymes is