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Diffusion

Quiz by Reena

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23 questions
Show answers
  • Q1
    Diffusion is the movement of particles from an area of ____ concentration to an area of ____ concentration.
    high, low
    high, high
    low, low
    low, high
    30s
  • Q2
    Which of the following factors affects the rate of diffusion?
    Surface area
    Pressure
    Particle size
    Temperature
    30s
  • Q3
    What is the process by which substances move across a semipermeable membrane from an area of higher concentration to an area of lower concentration?
    Active transport
    Facilitated diffusion
    Osmosis
    Diffusion
    30s
  • Q4
    Which of the following is an example of passive diffusion?
    Oxygen molecules moving from the lungs into the bloodstream
    Proteins being transported across the cell membrane through a channel protein
    Glucose molecules being transported across the cell membrane
    Sodium ions being pumped out of a cell against the concentration gradient
    30s
  • Q5
    Which of the following factors does NOT affect the rate of diffusion?
    Concentration gradient
    Surface area
    Temperature
    Color
    30s
  • Q6
    Which of the following is an example of osmosis?
    Glucose molecules being actively transported out of a cell
    Carbon dioxide diffusing through a cell membrane
    Sodium ions moving into a cell against the concentration gradient
    Water moving into a plant cell from a hypotonic solution
    30s
  • Q7
    Which of the following describes osmosis?
    The movement of solute molecules from an area of low concentration to an area of high concentration through a selectively permeable membrane.
    The movement of solute molecules from an area of high concentration to an area of low concentration through a non-permeable membrane.
    The movement of water molecules from an area of high solute concentration to an area of low solute concentration through a selectively permeable membrane.
    The movement of water molecules from an area of low solute concentration to an area of high solute concentration through a selectively permeable membrane.
    30s
  • Q8
    Which of the following factors does NOT affect the rate of osmosis?
    Membrane permeability
    Concentration gradient
    Temperature
    Pressure difference
    30s
  • Q9
    What happens to a plant cell when placed in a hypertonic solution?
    It shrinks and becomes flaccid.
    It remains unaffected.
    It undergoes plasmolysis.
    It swells and becomes turgid.
    30s
  • Q10
    What is a hypertonic solution?
    A solution with an equal concentration of solutes compared to another solution.
    A solution with a higher concentration of solutes compared to another solution.
    A solution with a higher concentration of solvents compared to another solution.
    A solution with a lower concentration of solutes compared to another solution.
    30s
  • Q11
    What is the process of osmosis driven by?
    The difference in solute concentration across a selectively permeable membrane.
    The pressure difference across a selectively permeable membrane.
    The difference in solvent concentration across a selectively permeable membrane.
    The temperature difference across a selectively permeable membrane.
    30s
  • Q12
    What is the purpose of osmosis in biological systems?
    To transport solute molecules across cell membranes.
    To increase the pressure inside cells.
    To maintain the balance of water and solute concentrations inside and outside of cells.
    To generate energy for cellular activities.
    30s
  • Q13
    What is a hypotonic solution?
    A solution with a lower concentration of solvents compared to another solution.
    A solution with a lower concentration of solutes compared to another solution.
    A solution with an equal concentration of solutes compared to another solution.
    A solution with a higher concentration of solutes compared to another solution.
    30s
  • Q14
    What is the main driving force behind osmosis?
    The presence of a selectively permeable membrane.
    The difference in solvent concentration between two solutions.
    The difference in solute concentration between two solutions.
    The pressure difference between two solutions.
    30s
  • Q15
    Which of the following is NOT a characteristic of active transport?
    Moves molecules against their concentration gradient
    Can be performed by protein pumps
    Movement down a concentration gradient
    Requires energy
    30s

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