(points, brainliest)

define the three classes of symbiotic relationship: mutualism, commensalism, and parasitism. give examples of each.

 A symbiotic relationship is the one where the interaction of different types of species takes place. The two species remain in close proximity. The relationship can be either harmful, or beneficial for both of the species. Commensalism, parasitism and mutualism are the examples of the symbiotic relationship. In commensalism, the two species lives in close association and one species receives the benefit and the other receives no harm and benefit. In parasitism, the two species lives in close association, in this one species receives the benefit and cause harm to the other species. In mutualism, the two species lives in close association, in this both species receives the benefit of association.

Explanation:

the binding of the substrate is dictated by the shape of each molecule. side chains on the enzyme interact with the substrate in a specific way, resulting in the making and breaking of bonds.