The answer is B. It changes the shape of the protein. Hope it helps! :)
Explanation:
Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. This R group, or side chain, gives each amino acid proteins specific characteristics, including size, polarity, and pH.
Some differences between the peripheral nervous system<span> (PNS) and the central </span>nervous system<span> (CNS): In the CNS, collections of neurons are called nuclei. In the PNS, collections of neurons are called ganglia. In the CNS, collections of axons are called tracts.</span>