Question

1. what does the lock and key model describe? the way enzymes and substrates fit together the way substances pass into a cell the way living cells create new cells the way cells use molecules for energy

Explanation:

The lock - and - key model is a concept in biochemistry that describes the specific interaction between an enzyme (the lock) and its substrate (the key). The active site of the enzyme has a specific shape that only allows certain substrates to bind to it, much like a lock can only be opened by a specific key.

Answer:

the way enzymes and substrates fit together