NEET BIOLOGY

Detailed explanation-1: -Nitrification. Nitrifying bacteria in the soil convert ammonia into nitrite (NO2-) and then into nitrate (NO3-). This process is called nitrification. Compounds such as nitrate, nitrite, ammonia and ammonium can be taken up from soils by plants and then used in the formation of plant and animal proteins.

Detailed explanation-2: -Nitrification. Nitrification is the process that converts ammonia to nitrite and then to nitrate and is another important step in the global nitrogen cycle. Most nitrification occurs aerobically and is carried out exclusively by prokaryotes.

Detailed explanation-3: -Nitrification. Nitrification is a two-step process in which NH3/ NH4+ is converted to NO3-.

Detailed explanation-4: -Pseudomonas are denitrifying bacteria and under anaerobic conditions convert nitrogen compounds present in soil like nitrates and ammonia into free gaseous nitrogen, thus recycling nitrogen back to atmosphere and completing the nitrogen cycle.

Detailed explanation-5: -Bacteria that convert atmospheric nitrogen into nitrogen compounds like ammonia are called nitrogen-fixing bacteria. These bacteria make nitrogen available for the plants. These are of 2 types, symbiotic nitrogen-fixing bacteria like Rhizobium and non-symbiotic nitrogen-fixing bacteria like Azotobacter.