Catalysts
pre-test active
| 112
which two substances bind using a lock-and-key mechanism?
o enzyme and substrate
reactant and substrate
o substrate and product
o reactant and product

ANSWER:

Enzymes and Substrate bind using a lock and key mechanism.

EXPLANATION:

Enzymes are molecules or proteins that help to speed up the "rate of chemical reactions" that occur within a cell. They are fundamental for life and help in metabolism and digestion. These enzymes work with a specific molecule known as substrate. In order to perform a chemical reaction, the enzyme shapes itself precisely to fit a specific substrate. If they don’t fit, they both alter and modify their shape and size to bind. This is known as enzyme-substrate interaction.