Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
The predominant form of histamine present in human blood is pKa, Histidine=60
ChemistryBiomoleculesJEE Main
Options:
  • A
  • B
  • C
  • D
Solution:
2088 Upvotes Verified Answer
The correct answer is:
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

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.