Question

The diagram below shows an enzyme and a substrate it can bind.

enzyme, substrate, and active site
How does the structure of this enzyme help with its function?
A.
The enzyme's shape complements the substrate's shape, so it only catalyzes specific reactions.
B.
Since the enzyme is larger than the substrate, catalytic reactions can occur within the enzyme itself.
C.
Since the enzyme's shape matches the substrate's shape, it catalyzes only reverse reactions.
D.
The enzyme's active site is amorphous and can change its shape to fit any substrate.