8.3 Photosynthesis

Nature of Science
1. Sources of 14C and autoradiography enabled Calvin to elucidate the pathways of carbon fixation
  1. TOK
    1. The lollipop experiment
      1. To what extent is the creation of an elegant protocol similar to the creation of a work of art?
Global Artificial Photosynthesis (GAP)
Annotation of a diagram to indicate the adaptations of a chloroplast to its functions
1. Light Dependent Reaction (LDR)
  1. In the intermembrane space of the thylakoids
    1. Photolysis of water
    2. Photophosphorylation
      1. ATP Formation
    3. Reduced NADP
  2. Photosystems
    1. Absorption of light generates excited electrons
      1. Transfer of excited electrons occurs between carriers in the thylakoid membranes (ETC)
        Photosystems II
        Electrons contribute to generate a proton gradient
        Photosystem I
        Electrons used to reduce NADP
        Hill's method demonstrating electron transfer in chloroplasts by observing DCPIP
2. Light Independent Reaction (LIR)
  1. In the stroma
    1. Calvin cycle
      1. Carboxylase catalyses the carboxylation of ribulose bisphosphate (RuBP)
        Calvin's experiment
      2. Glycerate 3-phosphate is reduced to triose phosphate
        Using reduced NADP
        Using ATP
    2. Triose phosphate
      1. Synthesis of carbohydrates
      2. Regenerate RuBP

Resource summary

	Created by Steve Harton over 10 years ago