Nitrogen Metabolism — Important Questions
Telangana Open School (TOSS) · Class 12 · Biology
52 important questions from Nitrogen Metabolism for Telangana Open School (TOSS) Class 12 Biology, with answers. Written for the board exams 2027.
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Important Questions from Nitrogen Metabolism
Which enzyme is responsible for converting nitrate to nitrite in plants?
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Nitrate reductase
Nitrate reductase catalyzes the reduction of nitrate (NO₃⁻) to nitrite (NO₂⁻) in plants.
Which of the following is NOT a step in the nitrogen cycle?
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Photosynthesis
Photosynthesis is part of the carbon cycle, not the nitrogen cycle. The nitrogen cycle includes fixation, assimilation, ammonification, nitrification, and denitrification.
What is the chemical formula of ammonia?
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NH₃
Ammonia is a compound of nitrogen and hydrogen with the formula NH₃.
Which of the following organisms performs symbiotic nitrogen fixation?
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Rhizobium
Rhizobium forms a symbiotic relationship with leguminous plants and fixes nitrogen inside root nodules.
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