Question

In the lock-and-key model of enzyme action, the ___________ fits into the __________ of the enzyme.

Answer 1

The answer is letter D. Substrate; Active Site The enzyme itself remains unchanged.  It advise the active place of an enzyme is frequently reshaped by interactions with the substrate until the substrate is completely bound and the chemical reaction occurs, the lock and key model.

Answer 2

wrong, the actual answer is C