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JAMB Exam  >  JAMB Tests  >  Test: Nitrogen Cycle and its Relevance to the Environment - 1 - JAMB MCQ

Test: Nitrogen Cycle and its Relevance to the Environment - 1 - JAMB MCQ


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10 Questions MCQ Test - Test: Nitrogen Cycle and its Relevance to the Environment - 1

Test: Nitrogen Cycle and its Relevance to the Environment - 1 for JAMB 2024 is part of JAMB preparation. The Test: Nitrogen Cycle and its Relevance to the Environment - 1 questions and answers have been prepared according to the JAMB exam syllabus.The Test: Nitrogen Cycle and its Relevance to the Environment - 1 MCQs are made for JAMB 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Nitrogen Cycle and its Relevance to the Environment - 1 below.
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Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 1
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Which of the following is not a step in the nitrogen cycle?

Detailed Solution for Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 1

Photosynthesis is the process by which plants convert carbon dioxide and water into glucose and oxygen. It does not directly involve the nitrogen cycle.

Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 2
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What is the primary source of nitrogen for the nitrogen cycle?

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The atmosphere is the primary source of nitrogen, which is mostly in the form of nitrogen gas (N2).

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Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 3
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What is the process by which nitrogen gas (N2) is converted into ammonia (NH3)?

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Nitrogen fixation is the conversion of atmospheric nitrogen gas (N2) into ammonia (NH3) by certain nitrogen-fixing bacteria or through industrial processes.

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Which group of bacteria is primarily responsible for the process of nitrification?
Detailed Solution for Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 4

Nitrifying bacteria are responsible for the conversion of ammonia (NH3) into nitrite (NO2-) and then into nitrate (NO3-) during nitrification.

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Which process releases nitrogen gas (N2) back into the atmosphere?
Detailed Solution for Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 5

Denitrification is the process by which nitrate (NO3-) is converted back into nitrogen gas (N2) by denitrifying bacteria, thus returning nitrogen to the atmosphere.

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Which of the following is a human activity that contributes to an imbalance in the nitrogen cycle?
Detailed Solution for Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 6

Deforestation disrupts the nitrogen cycle by reducing the number of plants and trees that absorb nitrogen from the soil, leading to increased nitrogen runoff and potential pollution.

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How does excessive nitrogen runoff from agricultural activities affect aquatic ecosystems?
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Excessive nitrogen runoff from agriculture can lead to nutrient enrichment in water bodies, causing algal blooms. Algal blooms consume oxygen during decomposition, leading to oxygen depletion and negatively impacting aquatic organisms.

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What is the role of leguminous plants in the nitrogen cycle?
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Leguminous plants have a symbiotic relationship with nitrogen-fixing bacteria in their root nodules, allowing them to convert atmospheric nitrogen into forms that can be used by plants.

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How does the burning of fossil fuels contribute to nitrogen cycle disruption?
Detailed Solution for Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 9

The burning of fossil fuels releases nitrogen oxides (NOx) into the atmosphere, which can eventually lead to increased nitrogen gas (N2) in the atmosphere, disrupting the balance of the nitrogen cycle.

Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 10
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Which of the following is an example of biological nitrogen fixation?
Detailed Solution for Test: Nitrogen Cycle and its Relevance to the Environment - 1 - Question 10

Biological nitrogen fixation occurs when certain bacteria, such as Rhizobium, form symbiotic relationships with leguminous plants and convert atmospheric nitrogen into a usable form, such as ammonia.

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