AP Biologyeasymcq1 pt
What makes the 20 amino acids different from one another?
A.Their R groups (side chains)
B.Their amino groups
C.Their carboxyl groups
D.The number of peptide bonds
Explanation
Core Concept
The R group varies — nonpolar, polar, acidic, or basic — giving each amino acid its chemical personality and dictating how proteins fold and function.
Correct Answer
ATheir R groups (side chains)
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