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Assertion  \mathrm{\alpha }-amino acids exist as dipolar ions or zwitter ions.

Reason  \mathrm{\alpha }-amino acids are the building blocks of proteins.

Option: 1

Both Assertion and Reason are correct, and Reason is the correct explanation for Assertion.


Option: 2

Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion.


Option: 3

Assertion is correct but Reason is incorrect.


Option: 4

Both Assertion and Reason are incorrect.


Answers (1)

best_answer

A zwitter ion is a molecule that has both positive and negative regions of charge. It is amphoteric in nature. a-Amino acid contains both basic and acidic group. In them amine is basic while carboxylic group is an acid group. Amine being basic accept the \mathrm{H}^{+} from -\mathrm{COOH} and leaves the -\mathrm{COOH} as -\mathrm{COO}^{-}.

Proteins on partial hydrolysis give peptides of varying molecular masses which upon complete hydrolysis give \alpha - amino acids.

Thus Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion 

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