A hydrophobic amino acid R group (side group) would be found where in a protein?
A. forming a peptide bond with the next amino acid in the polypeptide chain
B. on the outside of the folded chain, in the water
C. forming hydrogen bonds with other R groups
D. on the inside of the folded chain, away from water
E. only at one end of a protein chain
Ans: D. on the inside of the folded chain, away from water
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