Leaf Structure Quiz Questions With Answers

Reviewed by Stephen Reinbold
Stephen Reinbold, PhD, Biological Sciences |
Biology Expert
Review Board Member
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.
, PhD, Biological Sciences
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Leaf Structure Quiz Questions With Answers - Quiz

Photosynthesis is a crucial process that occurs in plants. Our 'Leaf structure quiz questions with answers ' will test your knowledge about leaves and the basic working of photosynthesis. Can you answer the quiz without any help? Let's see you try! Read all the questions in the quiz very carefully before answering. The questions in the quiz are specially made to make you learn and revise for your tests. Hence, it would be best if you give your best shot. Learn and grow. Good luck!


Questions and Answers
  • 1. 

    Which organelle of the leaf reflects back excess light? 

    • A.

      Stomata

    • B.

      Guard cells

    • C.

      Waxy cuticle

    • D.

      None of the above

    Correct Answer
    C. Waxy cuticle
    Explanation
    The waxy cuticle is a protective layer on the surface of leaves that helps reduce water loss and prevents excess light from entering the leaf. It reflects back excess light, preventing damage to the leaf tissues. Stomata are small openings on the leaf surface that regulate gas exchange, while guard cells surround the stomata and control their opening and closing. Therefore, neither stomata nor guard cells reflect back excess light.

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  • 2. 

    Which layer of the leaf has the most chlorophyll?

    • A.

      Palisade mesophyll

    • B.

      Spongy mesophyll

    • C.

      Epidermis

    Correct Answer
    A. Palisade mesophyll
    Explanation
    The palisade mesophyll layer of the leaf has the most chlorophyll. This layer is located just below the upper epidermis and is responsible for most of the photosynthesis in the leaf. The palisade mesophyll cells are tightly packed, vertically arranged, and contain numerous chloroplasts, which are the organelles responsible for carrying out photosynthesis. The high concentration of chlorophyll in the palisade mesophyll layer allows for efficient absorption of sunlight, which is essential for the process of photosynthesis to occur.

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  • 3. 

    What does the phloem transport through the leaf and on to the rest of the plant?

    • A.

      Food energy

    • B.

      Water and minerals

    • C.

      Chloroplast

    • D.

      None of the above

    Correct Answer
    A. Food energy
    Explanation
    The phloem transports food energy through the leaf and on to the rest of the plant. This is because the phloem is responsible for the transportation of sugars and other organic compounds produced during photosynthesis from the leaves to other parts of the plant, such as the roots, stems, and fruits. This allows the plant to distribute the necessary nutrients and energy to support growth and metabolism throughout its entire structure.

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  • 4. 

    In plants, photosynthesis mainly occurs in the ...

    • A.

      Leaf

    • B.

      Root

    • C.

      Stem

    Correct Answer
    A. Leaf
    Explanation
    Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. The leaf is the main site of photosynthesis in plants because it contains specialized structures called chloroplasts, which contain the pigment chlorophyll. Chlorophyll absorbs sunlight and uses its energy to convert carbon dioxide and water into glucose. The leaf also has a large surface area and is exposed to sunlight, allowing for efficient absorption of light energy. Therefore, the leaf is where photosynthesis mainly occurs in plants.

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  • 5. 

    Plants use carbon dioxide, water, and sunlight to produce glucose, water, and ...

    • A.

      Carbon dioxide

    • B.

      Oxygen

    • C.

      Nitrogen

    • D.

      None of the above

    Correct Answer
    B. Oxygen
    Explanation
    Plants undergo a process called photosynthesis, where they use carbon dioxide, water, and sunlight to produce glucose, which is a type of sugar used for energy storage. As a byproduct of this process, plants release oxygen into the atmosphere. Oxygen is essential for the survival of many organisms, including humans, as it is required for respiration. Therefore, the correct answer is oxygen.

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  • 6. 

    This green pigment captures the sun's energy in photosynthesis.

    • A.

      Leaf

    • B.

      Chlorophyll

    • C.

      Chlorine

    • D.

      All of the above

    Correct Answer
    B. Chlorophyll
    Explanation
    Chlorophyll is the correct answer because it is a green pigment found in plants that is responsible for capturing the sun's energy during the process of photosynthesis. It absorbs light energy and converts it into chemical energy, which is used to produce glucose and oxygen. Chlorophyll is essential for plants to carry out photosynthesis and is therefore directly involved in capturing the sun's energy.

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  • 7. 

    Which is the chemical equation for photosynthesis in plants?

    • A.

      C6H12O6 + 6O2 + ATP → 6CO2 + 6H2O

    • B.

      6CO2 + 6H2O + light → C6H12O6 + 6O2 

    • C.

      C6H12O6 + 6O2 → 6CO2 + 6H2O + energy

    Correct Answer
    B. 6CO2 + 6H2O + light → C6H12O6 + 6O2 
    Explanation
    The correct answer is 6CO2 + 6H2O + light → C6H12O6 + 6O2. This equation represents the process of photosynthesis in plants, where carbon dioxide (CO2) and water (H2O) are converted into glucose (C6H12O6) and oxygen (O2) in the presence of light. 

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  • 8. 

    The process of making food in a plant is called

    • A.

      Transpiration

    • B.

      Photosynthesis

    • C.

      Fertilization

    • D.

      Respiration

    Correct Answer
    B. Photosynthesis
    Explanation
    Photosynthesis is the correct answer because it is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. During photosynthesis, plants use chlorophyll in their leaves to capture sunlight energy and convert it into chemical energy, which is stored in the form of glucose. This process is essential for plants to produce their own food and is responsible for the oxygen production in the atmosphere. Transpiration is the process of water movement through a plant, fertilization is the process of sexual reproduction in plants, and respiration is the process of releasing energy from glucose in cells.

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  • 9. 

    Which of these is not needed to make food in a plant?

    • A.

      Sunlight

    • B.

      Carbon Dioxide

    • C.

      Chlorophyll

    • D.

      Flower

    Correct Answer
    D. Flower
    Explanation
    Flowers are not needed to make food in a plant. The process of making food in plants, known as photosynthesis, requires sunlight, carbon dioxide, and chlorophyll. Sunlight provides the energy needed for the process, carbon dioxide is used as a raw material, and chlorophyll is the pigment that captures sunlight and converts it into energy. Flowers, on the other hand, are reproductive structures in plants and are not directly involved in the process of making food.

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  • 10. 

    The plants give off what that animals need to survive?

    • A.

      Oxygen

    • B.

      Carbon dioxide

    • C.

      Chlorophyll

    • D.

      None of the above

    Correct Answer
    A. Oxygen
    Explanation
    Plants undergo photosynthesis, a process in which they convert carbon dioxide and sunlight into glucose and oxygen. The oxygen produced during this process is released into the atmosphere, providing animals with the necessary oxygen they need to survive through respiration. Therefore, the correct answer is oxygen.

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  • 11. 

    The animals breathe out what that plants need for photosynthesis?

    • A.

      Oxygen

    • B.

      Carbon dioxide

    • C.

      Chlorophyll

    • D.

      Nitrogen

    Correct Answer
    B. Carbon dioxide
    Explanation
    Plants require carbon dioxide for the process of photosynthesis. During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose (a form of sugar) and oxygen. The oxygen produced by plants is released into the atmosphere as a byproduct, while the glucose is used as a source of energy for the plant. Therefore, animals breathe out carbon dioxide, which is essential for plants to carry out photosynthesis and maintain their growth and survival.

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  • 12. 

    Light, CO2, H2O, and temperature are some factors that affect the rate of.........

    • A.

      Respiration

    • B.

      Photosynthesis

    • C.

      Transpiration

    • D.

      None of the above

    Correct Answer
    B. Photosynthesis
    Explanation
    Factors such as light, CO2, H2O, and temperature are known to affect the rate of photosynthesis. Photosynthesis is the process by which plants convert light energy into chemical energy, using CO2 and H2O to produce glucose and oxygen. Light is required as an energy source, while CO2 and H2O are necessary reactants. Temperature affects the rate of photosynthesis as it influences the activity of enzymes involved in the process. Therefore, the given factors are directly related to the rate of photosynthesis.

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Stephen Reinbold |PhD, Biological Sciences |
Biology Expert
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.

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  • Feb 15, 2024
    Quiz Edited by
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    Expert Reviewed by
    Stephen Reinbold
  • Jan 16, 2009
    Quiz Created by
    Cancerred

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