The naturally occurring amino acid that contains only one basic functional group in its chemical structure is
Solution
Among the given options, arginine, histidine, and lysine are all basic amino acids because they contain amino (-NH<sub>2</sub>) and imino (-NH=) functional groups that can accept a proton (H<sup>+</sup>) to become positively charged.
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Asparagine, on the other hand, contains an amide (-CONH<sub>2</sub>) functional group instead of an imino group. This functional group is not basic because it does not have a proton that can be easily removed. Therefore, the answer is: asparagine.
About this question
Subject: Chemistry · Chapter: Biomolecules · Topic: Carbohydrates
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