Q. 24

Lysine is _______ A. α-Amino acid

B. Basic amino acid

C. Amino acid synthesised in body

D. β-Amino acid

Answer :

α-C atom

(Lysine)


In Lysine, the amino group –NH2 is attached with an alpha Carbon atom to –COOH group. So this is an alpha(α) amino acid. So (i) is correct and (iv) is wrong.


Lysine contains a greater number of –NH2 groups than –COOH groups. So it is a basic amino acid. Therefore,(ii) is a basic amino acid.


Lysine is not synthesized in our body, it has to be supplied from outside food sources. So it is an essential amino acid. Therefore (iii) is also not correct.

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