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  • Biosensors
    • use biological components to determine the presence and concentrations of molecules such as glucose
    • Analyte = the compound under investigation
    • 1. Molecular Recognition
      • a protein (enzyme or antibody) or single strand of DNA (ssDNA) is immobilised to a surface
      • This will interact with or bind to the specific molecule under investigation
    • 2. Transduction
      • the interaction will cause a change in the transducer
      • Transducer- detects changes e.g. in the pH and produces a response
    • 3. Display
      • produces a visible, qualitative or quantitative signal
      • such as a particular colour on a test ***** or reading on a test machine


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