Nitrogen Cycle Processes and Functions

The video tutorial explains the nitrogen cycle, detailing its stages: decomposition, nitrification, plant absorption, denitrification, and nitrogen fixation. It highlights the role of bacteria in converting nitrogen into various forms, such as ammonia, nitrates, and nitrogen gas. The cycle's importance in plant growth and its continuation through different processes is emphasized. Example questions illustrate the cycle's application in real-world scenarios.

What are the main components involved in the nitrogen cycle?

• Only nitrogen gas

• Nitrogen gas, proteins, nitrates, and ammonia

• Only proteins and nitrates

• Only ammonia and nitrates

What is the role of bacteria in the decomposition process?

• They fix nitrogen gas into ammonium

• They convert nitrates back into nitrogen gas

• They break down proteins into amino acids and then into ammonia

• They convert ammonia into nitrates

What process converts ammonia into nitrites and nitrates?

• Decomposition

• Nitrification

• Nitrogen fixation

• Denitrification

How do plants utilize nitrates in the nitrogen cycle?

• They convert nitrates into nitrogen gas

• They absorb nitrates to form proteins

• They convert nitrates into ammonia

• They release nitrates into the air

What is the function of denitrifying bacteria?

• They absorb nitrates for plant growth

• They convert ammonia into nitrites

• They convert excess nitrates back to nitrogen gas

• They convert nitrogen gas into ammonium

What role do nitrogen-fixing bacteria play in the nitrogen cycle?

• They convert nitrates into ammonia

• They convert nitrogen gas into ammonium

• They convert ammonia into nitrites

• They convert nitrates back into nitrogen gas

What is the process called when nitrogen gas is converted into ammonium?

• Decomposition

• Nitrogen fixation

• Denitrification

• Nitrification

In the nitrogen cycle, what happens to proteins in dead organisms?

• They are converted directly into nitrates

• They are broken down into amino acids and then into ammonia

• They are converted into nitrogen gas

• They are absorbed by plants

What is the significance of understanding each process in the nitrogen cycle?

• To learn about atmospheric gases

• To identify different types of bacteria

• To know how to grow plants

• To understand the role of each process in the cycle

In the example question, what process converts nitrogen gas in the air into ammonium?

• Decomposition

• Nitrogen fixation

• Denitrification

• Nitrification