JEE Main 2018ChemistryBiomoleculesMediumMCQ

JEE Main 2018Biomolecules Question with Solution

JEE Main 2018 (08 Apr)

Question

The predominant form of histamine present in human blood is pKa, Histidine=60

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Show full solutionCorrect option: A
Correct answer
A

Step-by-step explanation

Structure of histamine


Blood is slightly basic in nature (pH=7.35) approx. At this pH terminal NH2 will get protonated due to more basic nature.
    Predominant structure of histamine is

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About this question

This is a previous-year question from JEE Main 2018, 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.