What two components are often found as part of an enzyme?

Proteins of which enzyme is composed of

Active site of enzyme

Explanation:

A biological enzyme is composed of proteins that enhance the rate of chemical and biological reactions with in a cell or organ.  

Thus, protein is one important component of enzyme.  

An enzyme attaches to only specific substrate at the active site. The compatibility of substrate and active site surface must be high enough to allow for easy attachment and further chemical reaction progression.  

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