Answer:
The role of rhinos in the food chain is to act as a primary consumer, since they are herbivores that eat nothing but plants and grasses
Explanation:
I looked it up :D
The part of the enzyme molecule that binds to its associated substrate is ACTIVE SITE.
The active site contains the catalytic groups which are amino acids which promote the formation and the break down of bonds. By breaking and forming new bonds, the enzyme substrate interaction brings about the formation of the transition state.
