MCQ
6 - amino purine is:
- AAdenine
- BAdenosine
- CCytidine
- DThymidine
Explanation:
From the structure of adenine, it is clear that it is 6 - amino purine.

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| Element | Fe | Co | Ni | Cu |
| Metallic radii/pm | 126 | 125 | 125 | 128 |
