Substrate
In
biochemistry, a
substrate is a
molecule undergoing a reaction, for which the presence of an
enzyme lowers the
activation energy. The substrate binds with the enzymes active site, and the enzyme provides an alternative reaction pathway with a lower activation enthalpy.
In
biology, a
substrate is an environment in which an organism lives, and which it feeds on. For example, in many households, a bruised
apple is a substrate for the growth of a
fungus