The process by which nitrates present in the soil are reduced back to gaseous nitrogen ($N_2$) is called:
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Correct answer: Denitrification
Denitrification is the process that completes the nitrogen cycle by releasing nitrogen back into the atmosphere. It is carried out by bacteria under anaerobic conditions.
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More Nitrogen cycle in nature questions
- Which of the following bacteria are responsible for denitrification?
- The enzyme complex responsible for the reduction of molecular nitrogen to ammonia in biological nitrogen fixation is:
- Which of the following is a free-living, aerobic nitrogen-fixing bacterium?
- The symbiotic nitrogen-fixing bacterium Rhizobium is found in the root nodules of:
- Which microbe forms nitrogen-fixing nodules on the roots of the non-leguminous plant Alnus?
- The pink-colored pigment found in the nodules of leguminous plants, which acts as an oxygen scavenger, is: