Which of the following statements are correct? ( 1 ) α -amino acids present in protein are α -L-amino acids ( 2 ) Amino acids contain - N H 2 as well as - C O O H group ( 3 ) Number of amino groups and carboxylic groups are always same in a

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Which of the following statements are correct? ( 1 ) α -amino acids present in protein are α -L-amino acids ( 2 ) Amino acids contain - N H 2 as well as - C O O H group ( 3 ) Number of amino groups and carboxylic groups are always same in all α -amino acids ( 4 ) Concentration of dipolar ion is maximum at isoelectric point Select the correct answer from the codes given below

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Correct answer: A. Only 1 and 2

Here statement 1, 2 and 3 are correct as α -amino acids present in protein are α -L-amino acids, Amino acids contain - N H 2 as well as - C O O H group.

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