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प्रश्न
Amino acids behave like salts rather than simple amines or carboxylic acids. Explain.
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उत्तर
In aqueous solution, the –COOH group of an amino acid loses a proton and –NH2 group accepts a proton to form zwitter ion (salt).
\[\begin{array}{cc}
\phantom{........}\ce{O}\phantom{........................}\ce{O}\phantom{.}\\
\phantom{........}||\phantom{........................}||\phantom{.}\\
\ce{H2N - CH - C - OH ⇌ H3\overset{+}{N} - CH - C - O-}\\
\phantom{........}|\phantom{.........................}|\phantom{.............}\\
\phantom{}\ce{\underset{Amino acid}{R}}\phantom{..............}\ce{\underset{Zwitter ion (inner salt)}{R}}\phantom{}
\end{array}\]
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संबंधित प्रश्न
Amino acids show amphoteric behaviour. Why?
Define the following term:
Essential amino acids
What are non-essential amino acids? Give two examples.
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Write the correct reaction for formation of the peptide bond between amino acids
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Differentiable between the following:
Essential amino acids Non-essential amino acids
The number of tripeptides formed by 3 different amino acids.
Which amino acids are chiral?
Match the following:
| I | II |
| (i) Amino acids | (A) protein |
| (ii) Thymine | (B) Nucleic acid |
| (iii) Insulin | (C) DNA |
| (iv) phosphodiester linkage | (D) Zwitter ion |
Which of the following is the best matched options?
Lysine, \[\begin{array}{cc}
\ce{H2N - (CH2)4 - CH - COOH}\\
\phantom{.....}|\\
\phantom{........}\ce{NH2}
\end{array}\] is:
(i) α-Amino acid
(ii) Basic amino acid
(iii) Amino acid synthesised in body
(iv) β-Amino acid
Which of the following compound can form a zwitterion?
X – Amino acid behave as crystalline ionic solid and have high melting-point due to the present of:-
Amino acid are least soluble in water.
Which of the following is a basic amino acid?
Why tryptophan is an essential amino acid?
Define Zwitter ion
