Uses of Triose Phosphate (OCR A Level Biology)

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Uses of Triose Phosphate

  • During the light-independent stage energy from ATP and hydrogen from reduced NADP (both products of the light-dependent stage) are used to reduce glycerate 3-phosphate (GP) to a phosphorylated three-carbon (3C) sugar known as triose phosphate (TP)
  • One-sixth of the triose phosphate (TP) molecules are used to produce useful organic molecules needed by the plant:
    • Triose phosphates can condense to become hexose phosphates (6C), which can be used to produce starch, sucrose or cellulose
    • Triose phosphates can be converted to glycerol while glycerate 3-phosphates can be converted to fatty acids. These molecules join together to form lipids for cell membranes
    • Triose phosphates can be used in the production of amino acids for protein synthesis

  • Five-sixths of the triose phosphate (TP) molecules are used to regenerate ribulose bisphosphate (RuBP). This process requires ATP

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Lára

Author: Lára

Expertise: Biology Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.