Biology GCSE AQA - CELLS

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1. Pick the equation relating image size, magnification and specimen size

  • image size = magnification/specimen size
  • magnification = image size/ specimen size
  • magnification = image size x specimen size
  • specimen size = image size x magnification
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2. Whats the correct statement about a light microscope?

  • Uses electrons to magnify
  • Samples have to be dead
  • Magnifies cells and sub-cellular structures
  • It's 3D

3. How is a cell made turgid?

  • When the water leaves the cell by osmosis
  • When the water pressure builds up and pushes against the cell wall
  • When the water particles keep moving randomly

4. What does muscle tissue do?

  • Contracts to churn food and and digestive juices
  • Contracts to release digestive juices
  • Separates food and digestive juices
  • The inner/outer layer of cells

5. What is diffusion?

  • Net movement of water particles from a low to a high concentration
  • Net movement of particles from a high to a low concentration
  • Net movement of water particles from a high to a low concentration
  • Net movement of particles from a low to a high concentration
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