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Histidine is a polar uncharged amino acid.

(a) True

(b) False

I had been asked this question in final exam.

The doubt is from Chemical Basis of Life topic in division Chemical Basis of Life of Cell Biology

1 Answer

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The correct answer is (b) False

For explanation: Histidine is considered a polar charged amino acid although it is not fully charged at physiological pH. The ability of Histidine to gain or lose a proton in physiological pH ranges, it is an important residue in active sites of many proteins.

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