Which of the following acid / base pairs act as natural buffers in living systems?

H_{2} C O_{3} / H C O_{3}^{-}

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H_{2} P O_{4}^{-} / H P O_{4}^{2 -}

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Histidine+ / histidine

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All of these

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Solution

The correct option is B All of these
$H_{2} C O_{3} / H C O_{3}^{-}; H_{2} P O_{4}^{-} / H P O_{4}^{2 -}; H i s t i d i n e^{+} / H i s t i d i n e$ all the buffers acts as natural buffers in living system.

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Similar questions

Identify Bronsted acids in the reaction : $H_{2} C O_{3} + H P O_{4}^{2 -} ⇌ H_{2} P O_{4}^{-} + H C O_{3}^{-}$

All common amino acids except one react with cold nitrous acid(HNO₂) and evolve nitrogen gas.

That amino acid is

(R - C H (N H_{2}) - C O O H)

{H C O_{3}}^{-} + H_{2} O \to O H^{-} + H_{2} C O_{3}

Which of the nitrogen of histidine is first protonated ?

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