JEE Main 2023 — Biomolecules Question with Solution
From: JEE Main 2023 (Online) 13th April Evening Shift
Question
The naturally occurring amino acid that contains only one basic functional group in its chemical structure is
Choose an option
Show full solutionCorrect option: A
Correct answer
Aasparagine
Step-by-step explanation
Among the given options, arginine, histidine, and lysine are all basic amino acids because they contain amino (-NH2) and imino (-NH=) functional groups that can accept a proton (H+) to become positively charged.
Asparagine, on the other hand, contains an amide (-CONH2) 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.
Asparagine, on the other hand, contains an amide (-CONH2) 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.
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This is a previous-year question from JEE Main 2023, covering the Biomolecules chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.