GCSE Biology OCR B4

a mind map to help you revise topic B4

HideShow resource information
View mindmap
  • B4
    • Respiration
      • Aerobic
        • releases more energy
        • with oxygen
      • Anaerobic
        • No oxygen
        • Can produce:
          • Lactic acid
          • in micro-organisms:
            • Ethanol
            • Carbon Dioxide
        • body cant supply enough oxygen
    • Enzymes
      • protein- catalyst
      • "lock and key"
        • enzyme has active site
          • substrate joins the enzyme
      • very selective
        • need specific constant temperature
          • too hot: bonds break
            • changes enzyme shape
              • substrate no longer fits
        • pH
          • too high or low- bonds break
            • denatured
          • pH is a measure of how acidic or alkaline a solution is
    • Photosyn-thesis
    • diffusion
      • movement of particles from high con. to low con.
        • does not need energy
      • uses CO2
      • produces 02
    • osmosis
      • water from dilute to more concen-trated solution
        • partially-permeable membrane
          • water movement
        • take in water by osmosis
          • water is drawn into the roots
    • active transport
      • chemicals move across a cell membrane from low to high con.
        • uses energy released from respiration
          • moves minerals from soil into root cells
  • releases more energy
  • amount of light

Comments

? Secret - Team GR

looks great ! :) 

u doing the ocr 21st century board for science ?

Similar resources:

See all resources »See all resources »