Multiple Choice
Which functional groups are present in the chemical structure of every standard amino acid?
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3. Amino Acids
Amino Acid Groups
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In a standard amino acid, what does the R group represent?
A
The alpha hydrogen atom attached to the central carbon and responsible for chirality
B
The carboxyl group (typically deprotonated in solution) that donates a proton
C
The variable side chain that differs among amino acids and largely determines their chemical properties
D
The amino group (typically protonated in solution) that forms peptide bonds
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