Which two substances bind using a lock-and-key mechanism?

Enzymes and Substrate

Explanation:

The lock and Key mechanism was first postulated in 1894 by Emil Fischer. In this analogy, the lock is the enzyme which has a definite shape, with only a keyhole which fits exactly to the right key, that its then the substrate. This mechanism is used to explain the way enzymes are specific or can only degrade a certain substrate.

answer; i believe the correct answer is (anemia);