Advertisements
Advertisements
प्रश्न
Amino acids behave like salts rather than simple amines or carboxylic acids. Explain.
Advertisements
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).
\[\begin{array}{cc}
\phantom{........}\ce{O}\phantom{........................}\ce{O}\phantom{.}\\
\phantom{........}||\phantom{........................}||\phantom{.}\\
\ce{H2N - CH - C - OH ⇌ H3\overset{+}{N} - CH - C - O-}\\
\phantom{........}|\phantom{.........................}|\phantom{.............}\\
\phantom{}\ce{\underset{Amino acid}{R}}\phantom{..............}\ce{\underset{Zwitter ion (inner salt)}{R}}\phantom{}
\end{array}\]
APPEARS IN
संबंधित प्रश्न
Amino acids show amphoteric behaviour. Why?
What are non-essential amino acids? Give two examples.
What are amino acids?
Write the correct reaction for formation of the peptide bond between amino acids
What is the difference between acidic amino acids and basic 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?
Which of the following acids is a vitamin?
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?
Describe the term D- and L- configuration used for amino acids with examples.
The amino acid are the end product of the digestion of:-
Which of the following is a basic amino acid?
Proteins are condensation polymers of:
Why tryptophan is an essential amino acid?
Define Zwitter ion
