There Are 20 Different Amino Acids

question 62

Multiple Choice

There are 20 different amino acids. What makes one amino acid different from another?

• A) different side chains (R groups) attached to a carboxyl carbon
• B) different side chains (R groups) attached to the amino groups
• C) different side chains (R groups) attached to an α carbon
• D) different structural and optical isomers
• E) different asymmetric carbons

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