Acetylcholinesterase is an enzyme that catalyzes the breakdown of the neurotransmitter acetylcholine. which of the following explains why acetylcholinesterase cannot be used to catalyze the breakdown of other neurotransmitters, like norepinephrine?

it would require a level of activation energy too high for acetylcholinesterase to react with other neurotransmitters.
binding with an alternate neurotransmitter would inhibit the reaction of the enzyme with acetylcholine.
reacting with another neurotransmitter would halt the production of the enzyme and raise the overall activation energy.
its shape determines the neurotransmitters that can reach its active center where activation energy is lowered.

i think it might be the last one

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure