MCQOPTIONS
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| 1. |
Which of the following gene clusters in bacteria is responsible for nitrogen fixation? |
| A. | nod, nif, fix |
| B. | nod, nif, nfx |
| C. | nod, nix, nfx |
| D. | ndx, nif, fix |
| Answer» B. nod, nif, nfx | |