AQA Biology GCSE Exchange

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  • 1/11 Questions

    The surface area of the small intestine is increased by the presence of what?

    • Cilia
    • Flagella
    • Villi
    • Alveoli
    • Hairs
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About This Quiz

A simple quiz for GCSE students studying B3 AQA BIology.

AQA Biology GCSE Exchange - Quiz

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  • 2. 

    What is the loss of water from a leaf?

    • Transportation

    • Translocation

    • Transpiration

    • Perspiration

    • Transpitation

    Correct Answer
    A. Transpiration
    Explanation
    Transpiration is the correct answer because it refers to the loss of water from a leaf through the stomata. Stomata are small openings on the surface of leaves that allow for the exchange of gases, but they also result in water vapor escaping from the leaf. This process is essential for the plant's survival as it helps to regulate temperature, transport nutrients, and maintain turgidity. Therefore, transpiration is the correct term to describe the loss of water from a leaf.

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  • 3. 

    Many plants have leaves with a thick........................ to reduce water loss.

    Correct Answer
    Waxy cuticle
    Explanation
    Plants have leaves with a thick waxy cuticle to reduce water loss. The waxy cuticle acts as a waterproof layer on the surface of the leaf, preventing excessive evaporation of water through the leaf surface. This adaptation helps plants to conserve water and maintain proper hydration, especially in dry or arid environments. The waxy cuticle also provides protection against harmful UV radiation, pathogens, and physical damage, making it an essential feature for plant survival.

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  • 4. 

    How does Active Transport differ from diffusion?

    • It is the movement of molecules

    • Takes place across a cell membrane

    • Is used in the re-absorption of glucose by the kidney

    • Uses ATP (energy)

    • Is used by root hair cells to uptake mineral ions from the ground.

    Correct Answer
    A. Uses ATP (energy)
    Explanation
    Active transport differs from diffusion because it requires the use of ATP (energy) to move molecules across a cell membrane. Diffusion, on the other hand, is a passive process that does not require energy and occurs due to the random movement of molecules from an area of higher concentration to an area of lower concentration. Active transport is specifically used in processes such as the re-absorption of glucose by the kidney and the uptake of mineral ions by root hair cells.

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  • 5. 

    Where does gas exchange take place in a mammal?

    • Lungs

    • Trachea

    • Alveoli

    • Bronchi

    • Bronchioles

    Correct Answer
    A. Alveoli
    Explanation
    Gas exchange in mammals takes place in the alveoli. Alveoli are tiny air sacs located at the end of the bronchioles in the lungs. They have thin walls and a large surface area, allowing for efficient exchange of oxygen and carbon dioxide between the air and the bloodstream. Oxygen from the inhaled air diffuses into the bloodstream through the alveoli, while carbon dioxide, a waste product, is removed from the bloodstream and exhaled out of the body through the alveoli. Therefore, the correct answer is Alveoli.

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  • 6. 

    What actively helps ventilate our lungs?

    • The trachea

    • The diaphragm

    • The nose

    • The bronchi

    • The pleural membranes

    Correct Answer
    A. The diaphragm
    Explanation
    The diaphragm actively helps ventilate our lungs. It is a dome-shaped muscle located at the base of the lungs. When we inhale, the diaphragm contracts and moves downward, creating more space in the chest cavity. This allows the lungs to expand and fill with air. When we exhale, the diaphragm relaxes and moves upward, pushing the air out of the lungs. This process of contraction and relaxation of the diaphragm helps in the inhalation and exhalation of air, facilitating the ventilation of our lungs.

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  • 7. 

    How are the gill lamellae of a fish not adapted for gas exchange?

    • Large surface area to volume ratio

    • Moistened

    • Rich Blood Supply

    • Thin

    • Fully Permeable

    Correct Answer
    A. Fully Permeable
    Explanation
    The gill lamellae of a fish are fully permeable, meaning that they allow the passage of gases through them. This adaptation is essential for efficient gas exchange, as it allows oxygen to diffuse into the bloodstream and carbon dioxide to diffuse out. Without this permeability, gas exchange would be hindered, and the fish would not be able to obtain the oxygen it needs for respiration.

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  • 8. 

    How could a fish improve the efficiency of gas exchange?

    • Swim slower

    • Reduce the blood supply to the gills

    • Move more water over its' gills.

    • Increase the thickness of the gill lamellae in the gill stack.

    • Reduce the surface area of the gills

    Correct Answer
    A. Move more water over its' gills.
    Explanation
    Moving more water over its gills would improve the efficiency of gas exchange in a fish. This is because the gills are responsible for extracting oxygen from the water and releasing carbon dioxide. By increasing the flow of water over the gills, more oxygen can be obtained and more carbon dioxide can be expelled, allowing for more efficient gas exchange.

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  • 9. 

    How does oxygen enter the body of a locust?

    • Tracheoles

    • Spiracles

    • Lamellae

    • Spirillium

    • Trachea

    Correct Answer
    A. Spiracles
    Explanation
    Spiracles are small openings on the body of a locust that allow oxygen to enter the body. These openings are connected to a network of tubes called tracheae, which distribute the oxygen to different parts of the body. The spiracles can be opened and closed by the locust, allowing it to control the amount of oxygen it takes in. Therefore, the oxygen enters the body of a locust through the spiracles.

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  • 10. 

    Where does gas exchange take place in an insect?

    • Tracheoles

    • Alveoli

    • Trachea

    • Bronchioles

    • Spiracles

    Correct Answer
    A. Tracheoles
    Explanation
    Gas exchange in insects takes place in the tracheoles. Tracheoles are tiny, thin-walled tubes that branch out from the larger trachea and deliver oxygen directly to the body tissues. They are located throughout the insect's body and provide a large surface area for efficient gas exchange. Oxygen diffuses from the tracheoles into the cells, while carbon dioxide produced by cellular respiration diffuses out of the cells and into the tracheoles to be expelled through the spiracles.

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  • 11. 

    Where does gas exchange take place in a leaf?

    • Spongy Mesophyll Layer

    • Stomata

    • Guard cells

    • Palisade Layer

    • Lower Epidermis

    Correct Answer
    A. Spongy Mesophyll Layer
    Explanation
    Gas exchange takes place in the spongy mesophyll layer of a leaf. This layer is located towards the lower part of the leaf and consists of loosely packed cells with air spaces in between. These air spaces allow for the diffusion of gases, such as carbon dioxide and oxygen, between the leaf and the surrounding environment. The spongy mesophyll layer also contains chloroplasts, which are responsible for photosynthesis. Overall, the spongy mesophyll layer plays a crucial role in facilitating gas exchange and photosynthesis in the leaf.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 14, 2009
    Quiz Created by
    Hel77v

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