Prepare for NEET Biology Mineral Nutrition (N2-Metabolism) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to study nitrogen fixation, ammonification, nitrification, and assimilation.
Nitrifying bacteria play a crucial role in the nitrogen cycle by:
Converting atmospheric nitrogen into ammonia
Reducing nitrate to nitrite and then to nitrogen gas
Oxidizing ammonia to nitrite and then nitrate
Converting organic nitrogen into ammonia
The process of conversion of ammonia to nitrite is called:
Nitrogen fixation
Nitrification
Denitrification
Ammonification
Which of the following microorganisms are primarily responsible for the conversion of nitrite to nitrate in the soil?
Nitrosomonas
Nitrobacter
Rhizobium
Azotobacter
The enzyme responsible for the first step in the reduction of nitrate during nitrogen assimilation is:
Nitrite reductase
Nitrate reductase
Nitrogenase
Glutamate dehydrogenase
Which amino acid is the primary product formed when ammonia is assimilated into organic compounds?
Aspartate
Glutamate
Glycine
Alanine
The process by which atmospheric nitrogen is converted into ammonia is called:
Nitrification
Denitrification
Ammonification
Nitrogen fixation
Which of these is a common nitrogen-fixing bacteria found in root nodules of leguminous plants?
Nitrosomonas
Nitrobacter
Azotobacter
Rhizobium
The enzyme responsible for nitrogen fixation is:
Nitrate reductase
Nitrite reductase
Ammonia synthase
Nitrogenase
Nitrogen fixation requires which element as a cofactor?
Iron
Magnesium
Molybdenum
Manganese