MCQ
Enzyme first used for nitrogen fixation is:
- ANitrogenase.
- BNitroreductase.
- CTransferase.
- DTransaminase.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$(1)$ Methanogens $(2) $ Anabaena $(3)$ $N_2$, fixation $(4)$ Thermoacido philus $(5)$ eykaryotes $(6)$ Diatoms $(7)$ gelatinous sheath $(8)$ Heterocyst
Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.