Nitrogen Cycle Processes and Bacteria

The video tutorial explains the nitrogen cycle, highlighting its importance in ecosystems. It covers nitrogen fixation, both artificial via the Haber process and natural through bacteria like rhizobium and as autobacter. The conversion of ammonia to plant protein and the role of nitrification and denitrification in recycling nitrogen are also discussed.

What is the primary source of nitrogen in the nitrogen cycle?

• Water

• Plants

• Atmosphere

• Soil

Which process is used industrially to fix nitrogen into ammonia?

• Haber Process

• Denitrification

• Nitrogenase Process

• Photosynthesis

Which bacteria is involved in the natural fixation of nitrogen?

• Pseudomonas

• Rhizobium

• Nitrobacter

• Nitrosomonas

What is the role of rhizobium in the nitrogen cycle?

• It denitrifies nitrates.

• It forms a symbiotic relationship with legumes.

• It fixes nitrogen independently.

• It converts ammonia to nitrites.

What happens to plant proteins after plants die?

• They decay into organic matter.

• They are assimilated by other plants.

• They are converted to nitrites.

• They are fixed into ammonia.

Which bacteria is responsible for converting ammonia into nitrites?

• Pseudomonas

• Nitrosomonas

• Rhizobium

• Nitrobacter

What is the final product of the denitrification process?

• Nitrates

• Nitrites

• Atmospheric nitrogen

• Ammonia

Which process involves the conversion of nitrites to nitrates?

• Denitrification

• Assimilation

• Nitrification

• Nitrogen fixation

What is the role of nitrobacter in the nitrogen cycle?

• It converts nitrites to nitrates.

• It fixes nitrogen into ammonia.

• It denitrifies nitrates.

• It forms a symbiotic relationship with legumes.

Which process returns nitrogen to the atmosphere?

• Nitrogen fixation

• Denitrification

• Assimilation

• Nitrification