Answer:
C. The enzyme changes shape and is no longer able to bind the substrate.
Explanation:
The change in heat changed the size of the enzyme. The enzyme changed size and shape which made it incapable of bonding with the substrate.
The answer I think is the environment for this one. <span />
Fungus because it is a living thing in its own right as opposd to a brain cell which is part of an organism.
The part of the amino acid that gives the molecule its unique or characteristic chemical properties would be the R-group. Every amino acid has three main groups in it namely the amino group, carboxyl group and the R group. "R" represents different organic chain that is specific to a certain amino acid which gives different properties of the molecule.