Answer:
C. Receptors and Synaptic vesicle
Explanation:
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An example of <span>nonsubstituted alkane that can exist as one of only two isomers is Butane with molecular formula </span>
<span>.</span>
Isomers are those having the same molecular formula but different chemical structure.
Non-substituted alkane means it is not substituted by any other atom.It has only carbon and hydrogen atoms attached to it.
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