Answer:
The mechanism of the complex is compared to a Lock and key mechanism.
Explanation:
Enzymes are configured to work with a specific substrate, therefore, this mechanism works like a key that perfectly fits a lock. There is also some shape references, due to the fact that enzyme and substrate must not only be chemically compatible but also structurally. And finally, when keys go into the lock, that's the only way that it can be opened, in the same way, enzymes only start working when their substrate is available.
