Chapter 10 - Biotechnology

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  • Chapter 10 - Biotechnology
    • Reasons for using microorganisms
      • Rapid life cycles - large population can be built up quickly
      • Asexual reproduction ensures the bacteria are genetically identical
      • Specific & simple requirements for growth
      • Can be grown from industrial waste products
      • No ethical issues
      • Variety of metabolic pathways so can be incredibly useful
    • Examples of products made using biotechnology
      • Manufacturing mycoprotein
        • Done using continuous culture
        • Continual input and output
    • Advantages
      • Batch culture
        • Relatively easy to set up
        • Fermenter can be used for a different process once that batch is done
        • If contamination occurs, only one batch needs to be thrown away
      • Continuous culture
        • Small vessels can be used
        • No 'down time' needed
    • Asepsis
      • 'without microorganisms'
      • Prevents contimantion
    • Immobilising enzymes
      • Can be done by any of the following techniques: Cross-linking, carrier-binding, enclosing them in micro-capsules or by inclusion
      • Makes enzymes reusable and less likley to be denatured


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