B4- the processes of life

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  • Created by: Fcvten
  • Created on: 23-03-15 15:42
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  • B4 - The Processes of Life
    • Cell Structure & Function
      • Plant Cells
        • Cell wall - made of cellulose. supports the cell & strengthens it.
        • Chloroplasts - where Fotosynthesis takes place.
        • Vacuole - a weak solution of sugar & salts(cell sap)
      • Animal Cells
        • Cell Membrane - holds the cell together & controls what goes in & out.
        • Cytoplasm - where enzymes are made
        • Mitochondria - where the reaction takes place, & where the enzymes are found.
        • Nucleus - contains DNA, which is instructions to make proteins.
      • Yeast
        • Cell membrane / nucleus / cell wall / mitochondria / cytoplasm
      • Simple cell structure
        • Cell wall
        • Cell membrane
        • Cytoplasm
        • Circular DNA molecule
    • Fotosynthesis
      • Chlorophyll is needed for Fotosynthesis
      • Is a series of chemical reactions that USES ENERGY from the SUN to PRODUCE FOOD.
      • Carbon dioxide + water = Glucose + Oxygen
      • 3 uses of glucose in plants.
        • Stores as Starch
        • Respiration
        • To make Chemicals for Growth
    • Enzymes
      • Lock & Key model: substrate needs to fit into the active site.
      • What are they?
        • Enzymes are proteins that speed up Chemical Reactions.
      • Enzymes work at their optimum Temperature & PH
    • Rate of Fotosynthesis
      • 3 factors that affect rate of Fotosynthesis
        • Amount of CO2
        • Amount of Light
        • Temperature
    • Diffusion, Osmosis & Active Transport
      • OSMOSIS: The movement of WATER MOLECULES from HIGH CONCENTRATION to an area of LOW CONCENTRATION.
      • DIFFUSION is the movement of particles from a region of HIGH CONCENTRATION to a region of LOW CONCENTRATION.
      • Active Transport: Movement of Chemicals across a CELL MEMBRANE from an area of LOW CONCENTRATION to HIGH CONCENTRATION using ENERGY released by respiration.
    • Anaerobic Respiration
      • Happens in; Human cells/ Plant Cells/ Bacterial cells
      • Produce Lactic Acid
        • Can also produce Ethanol & Carbon dioxide
      • "Anaerobic" just means "without oxygen"
    • Investigating Fotosynthesis
      • TRANSECT: to investigate how something changes across an area.
      • Light Meter Quadrat Indentification Key
    • Aerobic Respiration
      • "Aerobic" just means "with Oxygen"
      • Glucose + Oxygen = Carbon dioxide + Water + Energy
      • The energy released by respiration, is used to power some of the chemical reactions that happens in cells;
        • Movement
        • Synthesis of large molecules (polymers)
        • Active Transport

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