Sail E0 Webinar

General Knowledge > General Science

NITROGEN CYCLE MCQs

Total Questions : 26 | Page 1 of 3 pages
Question 1. What converts nitrogen gas into a usable form for plants and animals?
  1.    bacteria
  2.    rain
  3.    fungi
  4.    car exhaust
 Discuss Question
Answer: Option A. -> bacteria
Question 2. Round structures on the roots of certain plants
  1.    lichens
  2.    commensals
  3.    cataracts
  4.    nodules
 Discuss Question
Answer: Option D. -> nodules
Question 3. Where can nitrogen fixing bacteria be found
  1.    Free living in the soil
  2.    living on the nodules of certain plants
  3.    in the atmosphere
  4.    Both A & B
 Discuss Question
Answer: Option D. -> Both A & B
Question 4. How does fertilizer affect the nitrogen cycle
  1.    cause nitrous oxide, a greenhouse gas, to enter the atmosphere and trap heat
  2.    create large algae blooms in the water
  3.    cause the nitrogen fixing bacteria in the soil to be less productive
  4.    All Of above
 Discuss Question
Answer: Option D. -> All Of above
Question 5. What plants help or are beneficial to the nitrogen cycle?
  1.    peas
  2.    clover
  3.    peanuts
  4.    All Of above
 Discuss Question
Answer: Option D. -> All Of above
Question 6. What is the role of denitrifying bacteria
  1.    change nitrate back into nitrogen gas
  2.    change nitrogen gas into nitrate
  3.    absorb carbon dioxide in the soil
  4.    release oxygen gas into the atmosphere
 Discuss Question
Answer: Option A. -> change nitrate back into nitrogen gas
Question 7. Burning fossil fuels releases this into the air
  1.    nitrous oxide
  2.    nitrate
  3.    nitrogen gas (N2)
  4.    methane
 Discuss Question
Answer: Option A. -> nitrous oxide
Question 8. This can transform nitrogen in the atmosphere into a usable form of nitrogen
  1.    rain
  2.    ice
  3.    lightning
  4.    sun
 Discuss Question
Answer: Option C. -> lightning
Question 9. Plants and animals need nitrogen to make __________
  1.    Protein
  2.    Carbohydrates
  3.    Lipids
  4.    Minerals
 Discuss Question
Answer: Option A. -> Protein
Question 10. The process in which nitrogen circulates and is recycled is called
  1.    The nitrogen cycle
  2.    The carbon cycle
  3.    The water cycle
  4.    The phosphorus cycle
 Discuss Question
Answer: Option A. -> The nitrogen cycle

Latest Videos

Latest Test Papers