D2.3 Water potential

D2.3 Water potential Quiz

IB Biology HL: Quiz

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5 questions, one answer each

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  1. 1. HL: A cell has ψs = −900 kPa and ψp = +350 kPa. Its water potential is:

    • A. −1250 kPa
    • B. −550 kPa
    • C. +550 kPa
    • D. −350 kPa

  2. 2. HL: Water moves between cells with ψw −400 kPa (X) and −650 kPa (Y). The net movement is:

    • A. Y to X
    • B. X to Y
    • C. None
    • D. Both ways equally

  3. 3. HL: The reference point for water potential is:

    • A. Pure water at atmospheric pressure and 20 °C
    • B. Sea water
    • C. Cytoplasm
    • D. A 1 mol dm⁻³ sucrose solution

  4. 4. A red blood cell placed in distilled water will:

    • A. crenate
    • B. plasmolyse
    • C. swell and burst
    • D. stay the same

  5. 5. HL: A plasmolysed cell has a pressure potential of:

    • A. a large positive value
    • B. zero
    • C. equal to its solute potential
    • D. −95 000 kPa

Quiz