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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.
What is the difference between acidic amino acids and basic amino acids?
Differentiable between the following:
Essential amino acids Non-essential amino acids
Which amino acids are chiral?
Among the following a chiral amino acid is:
Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be ______.
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
Amino acids can be classified as α–, β–, γ–, δ– and so on depending upon the relative position of amino group with respect to carboxyl group. Which type of amino acids form polypetide chain in proteins?
The amino acid are the end product of the digestion of:-
Which of the following X – amino acids is not optically active?
Why tryptophan is an essential amino acid?
Define Zwitter ion
