10.1.1 Plant Cells and Magnification

• Plant cell membrane


  Made of lipids and proteins, controls substances that can enter and leave the cell
• Plant cell wall


  Made of cellulose, a carbohydrate made from glucose molecules, gives the plant cell structure and withstands high pressures
• Plant cells


  • Have a cell wall and a cell membrane (the cell wall is on the outside)
  • The cell is full of water (turgid) but does not burst due to the cell wall
• Chloroplasts


  Contain chlorophyll, which absorbs light energy, used by the plant to make glucose in photosynthesis
• Plants are called 'producers' as they can make their own organic nutrients
• Micrometer (µm)


  1000 µm = 1 mm

  
• Magnification


  Magnification = Image size / actual size, units must be the same (ie. both mm or both µm)
• Plant cells are between 10 and 100 micrometres (µm) in size