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Biology · Topic 35

Osmosis, diffusion and active transport

Sub-topic 1 2023 · National Preliminary Free

Reversing plasmolysis by osmosis in isotonic, saturated or hypotonic solutions (true/false)

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Sub-topic 2 2013 · National Preliminary Premium

Active transport moves solutes, not water directly (true/false)

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Sub-topic 3 2013 · National Preliminary Premium

Active transport moves molecules from lower to higher concentration (true/false)

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Sub-topic 4 2014 · National Final Premium

Spreading aroma is diffusion, not osmosis (true/false)

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Sub-topic 5 2014 · National Final Premium

Detecting perfume at a distance is diffusion (true/false)

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Sub-topic 6 2014 · National Final Premium

Gas exchange in leaves is diffusion, not osmosis (true/false)

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Sub-topic 7 2016 · National One-Eighth Premium

Active transport: movement of solutes against a concentration gradient

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Sub-topic 8 2016 · National One-Eighth Premium

Osmosis moves water from a dilute to a concentrated solution, not the reverse (true/false)

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Sub-topic 9 2016 · National One-Eighth Premium

Osmosis concerns water movement, not solute movement (true/false)

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Sub-topic 10 2016 · National One-Eighth Premium

Correct definition of osmosis: water from dilute to concentrated solution (true/false)

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Sub-topic 11 2021 · National Semifinal Premium

Constant tissue fluid concentration prevents osmotic bursting or shrinking of cells

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Sub-topic 12 2022 · National Preliminary Premium

Osmotic pressure is the pressure built up within a cell from water absorbed by osmosis

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