Biological molecules - topic 1.4

View mindmap
  • Topic 1.4
    • How enzymes work? - 1.4.2
      • The reaction has to get over the 'engery hill' - activation energy
        • Enzymes form a complex with the substrate
          • Catabolic reaction:substrate + enzyme = enzyme/substrate complex =enzyme + products
      • The 'lock - and key hypothesis'
        • Induced fit hypothesis
      • Initial rate of reaction - is affected by temperature , PH and concentration
        • Enzymes change only the rate of reaction
      • Evidence for the relationship betweeb structure and functions of enzymes
        • Enzymes speed up reactions to such an extent
          • Molecular activity - the number of substrate molecules transformed per minute by a single enzyme molecule
            • Temperature coefficient
        • Enzymes are very specific to the reaction that they catalyse
        • The number of substrate molecules present affects of an enzyme-catalysed reaction
    • Enzyme inhibition
      • Enzyme inhibitors
        • Reversible inhibitiob
          • Two forms of reversible inhibition
            • Competitive inhibition
              • similiar shape to substrate molecule
            • Non-competitive inhibition
              • may form a complex with either the enzyme itself or the enzyme/substrate complex
        • Irreversible inhibition
        • End - prodiuct inhibition: is a control system in many metabolic pathways in which an enzyme at the beginning of the pathway is inhibited by one of the end products of the reaction

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Biological molecules, organic chemistry and biochemistry resources »