Saved Bookmarks
| 1. |
Purines have nitrogen atoms at _____ positions.A. 1, 2, 4 and 6 positionB. 1, 3, 5 and 7 positionC. 1, 3, 7 and 9 positionD. 1, 2, 6 and 8 position |
| Answer» Correct Answer - C | |