Edexcel A (SNAB) A Level Biology:复习笔记5.2.6 Products of Photosynthesis

Products of Photosynthesis

  • Intermediate molecules of the Calvin cycle such as glycerate 3-phosphate (GP) and glyceraldehyde 3-phosphate (GALP) are used to produce other biological molecules needed by plants
  • GP is used to produce
    • Amino acids which can be used in protein synthesis for building polypeptides
    • Fatty acids which form the tails of lipid molecules such as triglycerides and phospholipids
  • GALP is used to produce:
    • Hexose sugars e.g. glucose
      • Hexose sugars can be converted into other hexose sugars e.g. glucose can be converted to sucrose for transport in the phloem
      • Hexose sugars can be joined to make polysaccharides such as starch and cellulose
    • Glycerol can be used for building lipid molecules such as triglycerides and phospholipids
    • Nucleic acids form the basis of DNA and RNA
  • Glucose can be used by the plant in respiration while other biological molecules are used to build new plant biomass
    • The molecules that make up plant biomass are passed on to consumers when plant tissue is eaten

The products of photosynthesis include amino acids, polysaccarides, lipids and nucleic acids