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Includes: 

  • Food production & crop plants

  • The effects on crop yield of increased carbon dioxide and increased temperature in glasshouses

  • How the use of fertiliser can increase crop yield

  • Reasons for pest control and the advantages and disadvantages of using pesticides and biological control with crop plants

  • Table of comparisons between minerals

  • Table of fertilisers, pest control and their pros & cons

  • Microorganisms; the role of yeast in the production of food including bread

  • Practical: investigate the role of anaerobic respiration by yeast in different conditions

  • the role of bacteria (Lactobacillus) in the production of yoghurt

  • use of an industrial fermenter and explain the need to provide suitable conditions in the fermenter, including aseptic precautions, nutrients, optimum temperature and pH, oxygenation and agitation, for the growth of micro-organisms

  • Selective breeding

  • How selective breeding can develop plants with desired characteristics

  • How selective breeding can develop animals with desired characteristics

  • Genetic modification

  • How restriction enzymes are used to cut DNA at specific sites and ligase enzymes are used to join pieces of DNA together

  • How plasmids and viruses can act as vectors, which take up pieces of DNA, and then insert this recombinant DNA into other cells

  • How large amounts of human insulin can be manufactured from genetically modified bacteria that are grown in a fermenter

  • How genetically modified plants can be used to improve food production
    + much more...

 

  • Detailed notes according to the mark scheme and specification

  • Key definitions

  • Coverage of past papers

  • Mnemonic for answer structure with example

  • Labelled diagrams

  • Experiment details

  • Past paper questions and mark scheme

  • And much, much more…

 

NOTE: all science notes are DOUBLE AWARD only (NOT triple!)

Topic 5 | Use of Biological Resources - iGCSE Biology

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