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The pK(a1) and pK(a2) of an amino acid a...

The `pK_(a1)` and `pK_(a2)` of an amino acid are 2.3 and 9.7 respectively. The isoelectric point of the amino acid is:

A

7.4

B

3.5

C

`12.0`

D

`6.0`

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The correct Answer is:
D
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