Lysine is _____________.

Neutral amino acid

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Acidic amino acid

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Basic amino acid

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Heterocyclic amino acid

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Solution

The correct option is C Basic amino acid
Ammonia and amines are basic because the nitrogen has an unshared electron pair that can accept a $H^{+}$ more readily that water does.

They will even, to some extent, take a $H^{+}$ from water, leaving a hydroxide $(O H^{-})$ ion.

Lysine has an amino group on its side chain, giving it a basic character.

Hence the correct option is C.

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