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ENTRANCE TEST – 2011 :: Discussion
| 40. | At intermediate value of pH, amino acids form Zwitter ions containing: | |
| A. | ―N+H3 and COO― | |
| B. | ―NH3 and COO― | |
| C. | ―N+H3 and COOH | |
| D. | ―NH3 and COOH | |
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