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B1 - Transport and Organisation
By Richard James
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Last updated over 4 years ago
11 questions
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Question 1
1.
Select the best definition of diffusion.
Active movement of substances from an area of low concentration to high concentration.
Passive movement of substances from an area of high concnetration to low concentration.
Movement of water through a partially permeable membrane.
Question 2
2.
Diffusion is a passive process. What does passive mean?
Requires energy.
Does not require additional energy.
Must pass through a membrane.
Question 3
3.
Diffusion eventually reaches equilibrium. Define 'equilibrium'
The particles are all grouped together and have stopped moving.
The particles have evenly spread out and stopped moving.
The particles have evenly spread out but are still moving around.
Question 4
4.
What effect will increasing the temperature have on the rate of diffusion?
No effect
Speeds up diffusion
Slows down diffusion
Question 5
5.
The greater the difference in concentration the faster/slower diffusion occurs.
Faster
Slower
Question 6
6.
Select the best definition of osmosis
Active movement of substances from an area of low concentration to high concentration.
Passive movement of substances from an area of high concnetration to low concentration.
Movement of water through a partially permeable membrane.
Question 7
7.
Osmosis moves from a _______ concentration of water to a _________ concentration of water.
High --> Low
Low --> High
Question 8
8.
When water moves into a plant cell...
they become hard and turgid.
they shrink and become flaccid
they swell up and pop
Question 9
9.
Select the best definition of active transport
Active movement of substances from an area of low concentration to high concentration, through a partially permeable membrane.
Passive movement of substances from an area of high concnetration to low concentration.
Movement of water through a partially permeable membrane.
Question 10
10.
Plant root hair cells use active transport to absorb what from the soil?
Oxygen
Water
Carbon Dioxide
Mineral ions
Question 11
11.
Where does the energy for active transport come from?
Respiration in the ribosomes
Respiration in the mitochondria
Distillation in the mitochondria
Distillation in the ribosome