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- 1. Multiple ChoiceHow does distance affect diffusion?Shorter the distance the faster the rateThe bigger the distance the faster the rateIt doesn't matter - molecules will always diffuse at the same rate
- 2. Multiple ChoiceHow does the concentration gradient affect diffusion?The greater the concentration difference the faster the rateThe smaller the concentration difference the faster the rateThe greater the concentration the slower the rate
- 3. Multiple ChoiceWhy is having a control in experiments important?It makes sure the independent variable is the reason for the resultsTo know what you originally started off withTo add another group of results making sure there's more data
- 4. Multiple ChoiceWhich of these molecules is not likely to enter a cell by diffusion?A proteinOxygenGlucoseWater
- 5. Multiple ChoiceWhat is diffusion?Actively moving molecules from a low to high concentrationActively moving water from a low to high concentrationMoving molecules along a concentration gradient until they are evenly spread
- 6. Multiple ChoiceWhy does diffusion not need energy?It occurs too fast for energy to be generatedMolecules move spontaneously from low to high concentrationsMolecules move spontaneously from high to low concentrationsMolecules move slowly so there is no need for energy
- 7. Multiple ChoiceHow does surface area affect the rate of diffusion?Greater the surface area the slower the rateGreater the surface area the faster the rateSmaller the surface area the faster the rateSurface area does not affect diffusion
- 8. Multiple ChoiceHow does increasing temperature affect the rate of diffusion?Increases enzyme activity increasing the rateGives molecules more energy increasing the rateTakes energy away from molecules slowing down the rateDecreases enzyme activity and decreases the rate
- 9. Multiple ChoiceHow does the cell membrane control which molecules can enter and leave the cell?Only allows big molecules throughOnly allows small molecules throughOnly allows molecules with Carbon throughOnly allows water through
- 10. Multiple ChoiceWhy is diffusion important?Molecules need to be moved out of cellsCells need a constant supply of some molecules whilst getting rid of othersThere is no other way of transporting things in or out of a cellIt requires energy which is always being produced and needs to be used up
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