CELL ACTIVITY

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  • Created by: LAUREN.F
  • Created on: 16-05-16 09:43
In which part of the cell is energy released during respiration?
Mitochondria.
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What is the function of chloroplast?
Absorb light for photosynthesis.
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Onion cells do not look green. Explain why.
Onion cells do not have chloroplast for photosynthesis because they are underground and do not receive light.
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Where is the DNA found in a bacterial cell?
In the cytoplasm (a bacterium does not have a nucleus).
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What type of respiration is fermentation?
Anaerobic respiration.
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Why do muscle cells need a lot of mitochondria?
Muscle cells need a lot of energy for movement. Energy release occurs in mitochondria.
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What is the function of a root hair cell?
Increases the surface area of the root hair cell.
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What is a generalised cell?
A cell that shows all the usual features of a cell but does not have specialised features.
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What determines the net movement of particles across a cell membrane?
The concentration of the particles on either side of the membrane.
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Give an example of a gas which diffuses into leaves in bright sunlight.
Carbon dioxide.
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What type of membrane is the cell membrane?
Partially permeable.
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What term is used to refer to two solutions with identical concentrations?
Isotonic.
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Explain why water moves into the bag in (a) and out the bag in (b).
(a) The sugar solution inside the bag is more concentrated than the water outside the bag. Water moves into the bag by osmosis. (b) The solution outside the bag is more concentrated than the water inside the bag, so water moves out the bag by osmosis
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Why does active transport require energy?
The particles are being absorbed against a concentration gradient.
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Name a substance which is moved into plants from soil by active transport.
Mineral ions.
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Why do large organisms need specialised exchange surfaces?
Large organisms have a small surface area to volume ratio. Exchange surfaces allow materials to be passed to a transport system which carries materials to all the cells.
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How are leaves adapted to increase their surface area?
The leaves are flat and thin, have internal air spaces and stomata.
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Give two features of the villi which make them efficient exchange surfaces.
Large surface area and thin walls.
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Suggest one substance which will pass from the gut to the blood.
Amino acids.
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Other cards in this set

Card 2

Front

What is the function of chloroplast?

Back

Absorb light for photosynthesis.

Card 3

Front

Onion cells do not look green. Explain why.

Back

Preview of the front of card 3

Card 4

Front

Where is the DNA found in a bacterial cell?

Back

Preview of the front of card 4

Card 5

Front

What type of respiration is fermentation?

Back

Preview of the front of card 5
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