Neurons that are i myelinated appear ___ which is what we call matter A. White:white
B. grey:grey
C. White:grey
D. grey:white

A

Explanation:

the most logical answer would be a

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme