The Sulfur Cycle MCQ Quiz

Reviewed by Zohra Sattar
Zohra Sattar, PhD, Chemistry |
Chemistry Expert
Review Board Member
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, where she studied the metallomes of cardiac cells, stem cells, and other mammalian tissues and how metal contents of biological systems impact function. Dr. Sattar Waxali has also studied the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products and small molecules.
, PhD, Chemistry
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The Sulfur Cycle MCQ Quiz - Quiz

Sulfur is one of the most abundant elements on earth. Our ' The sulfur cycle MCQ quiz ' will test your knowledge of the exchange and transformation of sulfur on earth. Are you well aware of this biogeochemical cycle? Let's test your knowledge with this simple quiz! All the questions are asked in a simple manner that will make you think! Make sure to answer all the questions carefully. Keep studying, and we wish you all the very best!


Questions and Answers
  • 1. 

    What is Sulfur?

    • A.

      A nonmetallic chemical element

    • B.

      A yellow rock

    • C.

      Dried up lava

    • D.

      Rain

    Correct Answer
    A. A nonmetallic chemical element
    Explanation
    Sulfur is a nonmetallic chemical element. It is a naturally occurring element that is found in various forms such as rocks, minerals, and even living organisms. It is known for its yellow color and distinctive smell. Sulfur is widely used in various industries including agriculture, pharmaceuticals, and manufacturing. It is an essential element for life and plays a crucial role in various biological processes.

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  • 2. 

    Which of the following activities releases Sulphur into the atmosphere?

    • A.

      By burning of fossil fuels

    • B.

      By the CFC emission

    • C.

      By burning wood

    • D.

      By manufacturing steel

    Correct Answer
    A. By burning of fossil fuels
    Explanation
    Burning of fossil fuels releases Sulphur into the atmosphere. Fossil fuels such as coal, oil, and natural gas contain small amounts of sulfur compounds. When these fuels are burned, the sulfur is oxidized and released as sulfur dioxide (SO2) gas. SO2 is a major contributor to air pollution and can lead to the formation of sulfuric acid and particulate matter, which can have harmful effects on human health and the environment.

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  • 3. 

    Plants absorb sulfur in what form? 

    • A.

      In the form on sulfuric acid

    • B.

      In the form of fossil fuels

    • C.

      In the form of amino acids such as methionine, cystine

    • D.

      In the form of pure sulfur

    Correct Answer
    C. In the form of amino acids such as methionine, cystine
    Explanation
    Plants absorb sulfur in the form of amino acids such as methionine and cystine. Amino acids are the building blocks of proteins, and sulfur is an essential component of some amino acids. These amino acids are synthesized by plants using the sulfur they absorb from the soil. Methionine and cystine are important for the structure and function of proteins in plants. Therefore, plants obtain sulfur in the form of these amino acids to support their growth and development.

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  • 4. 

    Sulfur makes up which essential compound in living organisms?

    • A.

      Fats

    • B.

      Proteins and vitamins

    • C.

      Carbohydrates

    • D.

      All of the above

    Correct Answer
    B. Proteins and vitamins
    Explanation
    Sulfur is an essential element in living organisms and plays a crucial role in the structure and function of proteins. It is a component of certain amino acids, such as cysteine and methionine, which are building blocks of proteins. Sulfur is also present in some vitamins, such as biotin and thiamine. Therefore, the correct answer is proteins and vitamins.

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  • 5. 

    The sulfur cycle is also known as what type of cycle? 

    • A.

      Elemental cycles

    • B.

      Soil cycles

    • C.

      Gaseous cycles

    • D.

      Biogeochemical cycle

    Correct Answer
    D. Biogeochemical cycle
    Explanation
    The sulfur cycle is known as a biogeochemical cycle because it involves the movement of sulfur through both biological and geological processes. This cycle includes the release of sulfur from rocks and volcanoes, its uptake by plants and other organisms, and its return to the atmosphere through various processes such as decomposition and volcanic activity. The term "biogeochemical" emphasizes the interconnectedness of biological, geological, and chemical processes in the cycling of sulfur.

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  • 6. 

    What does acid rain do?

    • A.

      Creates winds

    • B.

      Increases productivity of plants

    • C.

      Lowers the pH of soils, lakes, and rivers

    • D.

      Blocks solar radiation

    Correct Answer
    C. Lowers the pH of soils, lakes, and rivers
    Explanation
    Acid rain is formed when pollutants such as sulfur dioxide and nitrogen oxide react with water vapor in the atmosphere. When this acidic precipitation falls to the ground, it can lower the pH of soils, lakes, and rivers. This decrease in pH can have harmful effects on the ecosystem, as it can damage plant life, aquatic organisms, and even buildings and infrastructure. Therefore, the correct answer is that acid rain lowers the pH of soils, lakes, and rivers.

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  • 7. 

    How is Sulfur Dioxide NOT created? 

    • A.

      Smelting

    • B.

      Burning coal

    • C.

      Volcanoes

    • D.

      Compressing ocean rocks

    Correct Answer
    D. Compressing ocean rocks
    Explanation
    Sulfur dioxide is not created by compressing ocean rocks. Sulfur dioxide is primarily produced through the burning of fossil fuels such as coal, oil, and gas. It is also released during volcanic eruptions and certain industrial processes like smelting. However, compressing ocean rocks does not generate sulfur dioxide.

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  • 8. 

    How are humans trying to be proactive in reducing our sulfur emission? 

    • A.

      By refining fossil fuels in factories

    • B.

      By using clean coal

    • C.

      By producing acid rain

    • D.

      Increasing metal mining

    Correct Answer
    B. By using clean coal
    Explanation
    Humans are trying to be proactive in reducing our sulfur emission by using clean coal. Clean coal refers to the process of removing pollutants, including sulfur, from coal before it is burned. This helps to reduce the amount of sulfur dioxide released into the atmosphere, which is a major contributor to air pollution and acid rain. By utilizing clean coal technology, we can minimize the environmental impact of coal combustion and work towards a more sustainable energy source.

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  • 9. 

    Which of the following is an Organic Reservoir? 

    • A.

      Deep oceanic rock

    • B.

      The atmosphere

    • C.

      Ice

    • D.

      Soil

    Correct Answer
    D. Soil
    Explanation
    Soil is considered an organic reservoir because it contains a large amount of organic matter, such as decomposed plant and animal material. This organic matter provides nutrients and energy for various organisms in the soil, including bacteria, fungi, and earthworms. Additionally, soil acts as a storage and recycling system for organic compounds, helping to regulate carbon and nutrient cycles in ecosystems. Therefore, soil plays a crucial role in maintaining the balance of organic materials in the environment.

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  • 10. 

    Sulfur is usually trapped in which layer of the atmosphere?

    • A.

      Lithosphere

    • B.

      Asthenosphere 

    • C.

      Troposphere

    • D.

      Mesosphere

    Correct Answer
    A. Lithosphere
    Explanation
    The lithosphere is the solid outer layer of the Earth that includes the crust and uppermost part of the mantle. Sulfur is usually trapped in the lithosphere as it is commonly found in minerals and rocks. It is not typically found in the atmosphere, such as the troposphere or mesosphere, which are different layers of the Earth's atmosphere. The asthenosphere, on the other hand, is a semi-fluid layer beneath the lithosphere and does not typically contain trapped sulfur.

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Zohra Sattar |PhD, Chemistry |
Chemistry Expert
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, where she studied the metallomes of cardiac cells, stem cells, and other mammalian tissues and how metal contents of biological systems impact function. Dr. Sattar Waxali has also studied the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products and small molecules.

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