Question

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

Explanation:

The lock - and - key model in biology describes the specific fit between an enzyme (the lock) and its substrate (the key). Just as a key has a unique shape that fits only one lock, an enzyme has an active site with a specific shape that binds to a particular substrate.

Answer:

the way enzymes and substrates fit together