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Why are amino acids also called alpha - ...

Why are amino acids also called `alpha` - amino acids ?

A

They have `alpha` - carbon with amino and acid group.

B

They are rotated clockwise.

C

They are rotated anti - clockwise

D

They rotate the plane of polarized light to the right.

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The correct Answer is:
A
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Carboxylic acids containing an amino group (-NH_(2)) as a substituent are called amino acids. When this amino group substitution is at alpha position with respect to carboxylic group, the aminoacid is called alpha -amino acid. The aminoacids with two carboxylic acids are called acidic amino acids whereas aminoacids with two amino group are called basic amino acids Amino acids show amphoteric character. Ali chiral natural amino acids exist in L-form. : Which of the following is not an alpha -amino acid?

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