Difference between Facilitated diffusion and active transport
Facilitated = involves carrier and channel proteins, is passive,goes down concentration gradient/ Active= only involves carrier protein, uses ATP, goes against concentration gradient
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What is a PROCESSED result
Calculations made from raw data, Raw data would have recorded initial and final masses
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How does the potatoe tissue change in mass in a 0.4 mol dm−3 solution of sucrose
Water potential of solution is less than (more negative) than that of potato tissue. Tissue loses water by osmosis
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From results how would you fine the water potential of the potato tissue
Plot a graph with concentration on the x-axis and percentage change in mass on the y-axis/Find concentration where curve crosses the x-axis / where percentage change is zero/Use (another) use resource to find water potential of sucrose concentration
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How does the 2 temperature show active transport is taking place (4*C and 37*C)
Concentration uptake is faster at 37°C/Due to faster respiration / ATP production
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How substances move across membrane
By simple diffusion, faciliated diffusion, active transport, osmosis, PHAGOCYTOSIS, EXOCYTOSIS
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Why does putting honey on cuts kills bacteria
Water potential in bacteria cell is higher than the honey, water leaves bacteria / by osmosis/ loss of water stops metabolic reaction
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why is diffusion a passive process
it doesnt require any external energy, ATP. its a net movement of particles - from an area of low concentration to an area of high concentration
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How does the concentration gradient affect the rate of diffusion
The steeper the concentration gradient the faster the rate of diffusion.
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