B4 Quiz

Based on the grade booster checklist in my revision guide

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1. What is diffusion?

  • The movement of water across a cell membrane
  • The random movement of molecules
  • The movement of molecules from an area of high to low concentration
  • The movement of molecules from an area of low to high concentration
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2. What does the cell membrane do?

  • Regulates the oxygen intake
  • Regulates what enters and leaves cells
  • Regulates the pH in the cell
  • Regulates the cell temperature

3. What two things do all enzymes have?

  • Optimum pH and concentration
  • Optimum temperature and pH
  • Optimum concentration and temperature
  • Optimum pH and volume

4. What does an enzyme work with?

  • Any reaction
  • A variety of substrates
  • Only one type of substrate
  • All substrates

5. What does aerobic respiration require?

  • Oxygen
  • Nitrogen
  • Lactic acid
  • Carbon dioxide

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