Osmosis Quiz Questions And Answers

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Osmosis Quiz Questions And Answers - Quiz

Do you know about the process of osmosis? Then, you must take this osmosis quiz to check your knowledge regarding the same. Osmosis involves transferring water from a less concentrated solution to a more robust solution through a semipermeable membrane. Most people confuse it with diffusion, which does not involve movement through a membrane. See how much you understood osmosis in the class by playing the quiz below. Are you ready then? Good luck, buddy!


Questions and Answers
  • 1. 

    The cell wall prevents a plant cell from bursting when placed in distilled water.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The cell wall is a rigid structure surrounding the cell membrane in plant cells. It provides support and protection to the cell. When a plant cell is placed in distilled water, the water concentration outside the cell is higher than inside the cell, causing water to enter the cell by osmosis. The cell wall prevents the cell from bursting by exerting an outward pressure on the cell membrane, maintaining the shape and integrity of the cell. Therefore, the statement is true.

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  • 2. 

    If a cell is placed in salt water, water will:

    • A.

      Leave the cell and the cytoplasm and cell membrane shrink.

    • B.

      Enter the cell and the cytoplasm and cell membrane expand.

    • C.

      Nothing will change because water cannot pass through the membrane

    • D.

      None of the above

    Correct Answer
    A. Leave the cell and the cytoplasm and cell membrane shrink.
    Explanation
    When a cell is placed in salt water, the water concentration inside the cell is higher than outside. As a result, water molecules move out of the cell through osmosis, causing the cell to shrink. This process is known as plasmolysis. The salt water creates a hypertonic environment, where the concentration of solutes is higher outside the cell compared to inside. This causes water to leave the cell, resulting in the shrinking of the cytoplasm and cell membrane. Therefore, the correct answer is that water will leave the cell and the cytoplasm and cell membrane will shrink.

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  • 3. 

    What is true about osmosis?

    • A.

      Diffusion of water through a semi-permeable membrane

    • B.

      It is a passive process.

    • C.

      Both A and B

    • D.

      None of the above

    Correct Answer
    C. Both A and B
    Explanation
    Osmosis is the process by which water molecules move from an area of higher concentration to an area of lower concentration through a semi-permeable membrane. This movement occurs passively, meaning it does not require any energy input. Therefore, the correct answer is both A and B, as osmosis involves the diffusion of water through a semi-permeable membrane and is a passive process.

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  • 4. 

    When the amount of water in a cell is higher than the amount of solute in a cell it is _______.

    Correct Answer
    hypotonic
    Explanation
    When the amount of water in a cell is higher than the amount of solute in a cell, the solution is hypotonic. In a hypotonic solution, the concentration of solute is lower inside the cell compared to the surrounding environment. This causes water to move into the cell through osmosis, leading to cell swelling or potential lysis if the excess water is not regulated.

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  • 5. 

    What is active transport?

    • A.

      A transportation medium

    • B.

      No energy required

    • C.

      Movement of molecules across a semi-permeable membrane against a concentration gradient that requires energy

    • D.

      Movement of molecules across a semi-permeable membrane with a protein

    Correct Answer
    C. Movement of molecules across a semi-permeable membrane against a concentration gradient that requires energy
    Explanation
    Active transport is the movement of molecules across a semi-permeable membrane against a concentration gradient with the help of a protein. Unlike passive transport, active transport requires energy to pump molecules from an area of lower concentration to an area of higher concentration. This process is essential for maintaining proper cellular function and is often used to transport ions and other molecules that are needed in higher concentrations inside the cell.

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  • 6. 

    How is isotonic defined?

    • A.

      Diffusion of water through a semi-permeable membrane

    • B.

      When the amount of the solute is higher than the amount of water in a cell.

    • C.

      When the amount of water and solute in a cell are at equilibrium.

    • D.

      By active transport

    • E.

      By passive transport

    Correct Answer
    C. When the amount of water and solute in a cell are at equilibrium.
    Explanation
    Isotonic is defined as a state in which the amount of water and solute in a cell are at equilibrium. In an isotonic solution, the concentration of solutes outside the cell is the same as the concentration inside the cell, resulting in no net movement of water across the cell membrane. This means that the cell neither gains nor loses water, maintaining its normal shape and function.

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  • 7. 

    What is movement in diffusion based on?

    • A.

      The speed at which the molecules move.

    • B.

      No movement.

    • C.

      Movement is based on kinetic energy (speed), charge, and mass of molecules.

    • D.

      Passive energy

    Correct Answer
    C. Movement is based on kinetic energy (speed), charge, and mass of molecules.
    Explanation
    Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. This movement is driven by the kinetic energy, charge, and mass of the molecules. The molecules are in constant motion due to their kinetic energy, and this random motion causes them to spread out and mix with other molecules. The charge and mass of the molecules also play a role in determining the rate and direction of diffusion. Therefore, movement in diffusion is based on the kinetic energy, charge, and mass of the molecules involved.

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  • 8. 

    Describe a cell that is in an isotonic environment.

    • A.

      When the amount of water in a cell is higher than the amount of solute in a cell.

    • B.

      A cell that has an equilibrium of water to solute.

    • C.

      When the amount of water and solute in a cell are at equilibrium.

    • D.

      All of the above

    Correct Answer
    B. A cell that has an equilibrium of water to solute.
    Explanation
    A cell that is in an isotonic environment is one where the amount of water and solute in the cell are at equilibrium. In other words, there is an equal concentration of water and solute inside the cell. This means that there is no net movement of water into or out of the cell, as the concentration is balanced.

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  • 9. 

    In a solution, salt is considered the solute.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    In a solution, the solute is the substance that is dissolved in the solvent. Since salt is the substance that is being dissolved in the solution, it is considered the solute.

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  • 10. 

    There are _____ types of osmotic conditions.

    Correct Answer
    3, three
    Explanation
    The question asks for the number of types of osmotic conditions. The answer is 3 or three. This means that there are three different types of osmotic conditions.

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Lindsey Block |BS, Cellular & Molecular Biology |
Biology Expert
"Lindsey, Ph.D. in cellular and molecular biology from the University of Wisconsin-Madison, specializes in Zika's impact on conception and preterm birth biomarkers. She completed courese on Advanced Cell Biology at the University of Illinois at Urbana-Champaign and Advanced Virology at University College Cork. Lindsey's accolades include three first-author papers, three fellowships, and active participation in five conference presentations. Currently associated with the University of Pennsylvania through a T32 NIH Postdoctoral Fellowship, she continues to contribute significantly to her field, combining academic rigor with practical research to advance understanding in reproductive health and prenatal care. Currently, she is a full time lecturer at Northwestern University - The Feinberg School of Medicine.
"
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