Basic Enzyme Definitions

Prof. Wilson: Let’s revise some key terminology about enzymes before continuing with today’s experiment. These are very important to understand enzyme action. 

What is a substrate, active site and a product?

Pick the option with the best description of the terminologies:

Option 1:

Substrate is an end molecule which is released at the end of a reaction

Active site is a region on an enzyme where the substrate binds

Product is a reactant that an enzyme acts on in the reaction

Option 2:

Substrate is a molecule that aids the enzyme to function

Active site is a region on an enzyme where the substrate binds

Product is a molecule that stops the enzyme from working

Option 3:

Substrate is a reactant that an enzyme acts on in the reaction

Active site is a region on an enzyme where the substrate binds

Product is an end molecule which is released at the end of a reaction