Biology MCQs with answers Page - 212

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Q. Which of the following plant fibres is known as the “golden fibre”?

  • (A) Coir
  • (B) Jute
  • (C) Hemp
  • (D) All of the above

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Q. Which of the following states are known for the largest cotton-producing crops?

  • (A) Punjab
  • (B) Gujarat
  • (C) Rajasthan
  • (D) All of the above

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Q. The different types of carbon compounds are _________

  • (A) Lipids
  • (B) Nucleic acids
  • (C) Carbohydrates
  • (D) All of the above

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Q. What is the total percentage of carbon present in the human body?

  • (A) 15 to 16 per cent
  • (B) 18 to 19 per cent
  • (C) 20 to 25 per cent
  • (D) None of the above

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Q. Which of the following statements is true about carbon?

  • (A) Carbon is the main component of carbohydrates.
  • (B) Carbon is a major component of living beings.
  • (C) Carbon is one of the basic building blocks for organic life
  • (D) All of the above

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Q. In the atmosphere, carbon exists in the form of ..............

  • (A) Coal
  • (B) Carbon monoxide only
  • (C) Carbon dioxide only
  • (D) Both (b) and (c)

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Q. What is the total percentage of carbon present in the atmosphere?

  • (A) 0.04 percentage
  • (B) 20 percentage
  • (C) 0.09 percentage
  • (D) 0 to 4 percentage

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Q. Which of the following factors contributes to the carbon cycle?

  • (A) Respiration
  • (B) Fossil fuels
  • (C) Photosynthesis
  • (D) All of the above

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Q. Which of the following statements is true about the carbon cycle?

  • (A) Respiration and photosynthesis are important parts of the carbon cycle
  • (B) Respiration and photosynthesis are important parts of the water cycle
  • (C) Respiration and photosynthesis are important parts of the nitrogen cycle
  • (D) None of the above

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Q. Which of the following serves as the main source of carbon for plants?

  • (A) Fossil fuels
  • (B) Atmospheric carbon dioxide
  • (C) Both (a) and (b)
  • (D) None of the above

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