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25
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What is plasmolysis?
Shrinking/pulling/tearing away of a plant cell's membrane from its cell wall.
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20
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What is meant by a partially permeable membrane?
It lets some molecules to pass through but not others.
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trap
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gift
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rocket
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thief
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10
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True or False: Diffusion happens faster when the temperature rises.
True
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25
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List three examples of diffusion in living organisms.
roots absorbing water, gas exchange, absorption of nutrients
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25
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How do cells become flaccid?
The environment has a higher concentration of solutes. The solution is very concentrated.
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15
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Which part of a plant cell is fully permeable?
cell wall
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10
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True or False: Plant cells do not burst in pure water while animal cells burst in pure water.
True
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15
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True or False: Animal cells plasmolysed in a concentrated sugar solution.
False. Only plant cells can plasmolysed.
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10
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True or False: If Visking tubing containing a sugar solution is put into a beaker of water, the sugar solution moves out of the tubing by osmosis.
False. Water molecules move into the cell.
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heart
Other team wins 20 points!
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shark
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fairy
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25
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baam
Lose 20 points!
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10
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True or False: Water moves out of the cell by osmosis, through the partially permeable cell wall.
False. Partially permeable membrane not cell wall.
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15
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What effect does an increase in temperature have on the kinetic energy of molecules of a gas or a solute?
The molecules move faster.
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15
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What is meant by a turgid cell?
tight and firm, bigger or swollen
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10
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_____________ is an energy-consuming process by which substances are transported against their concentration gradient.
Active transport
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thief
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gift
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gift
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thief
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