NTA Abhyas NEET2020BotanyBiological ClassificationPractice
Monerans with both carbon and nitrogen reducing enzymes are
Options
- AAll photosynthetic bacteria
- BHeterocystous BGA and some photosynthetic bacteria
- CHeterocystous BGA but no eubacteria
- DAll photoautotrophic bacteria and some BGA
Correct answer
B. Heterocystous BGA and some photosynthetic bacteria
Step-by-step solution
Cyanobacteria or blue-green algae and photosynthetic bacteria (contain chlorophyll, are placed under kingdom Monera. Nitrogen fixing cyanobacteria need only nitrogen and carbon dioxide to live. The presenece of heterocysts, which contain the enzyme nitrogenase, vital for nitrogen fixation.