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CAIE A-Level Biology 13.1.8 Cyclic Photophosphorylation

Practise tracing PSI electrons through carriers and back to reaction-centre chlorophyll, producing ATP without photolysis, oxygen release or reduced NADP.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • identify photosystem I as the only photosystem involved in the cyclic pathway
  • trace excited electrons through carriers and back to oxidised reaction-centre chlorophyll
  • state that ATP forms without photolysis, oxygen release or reduced NADP

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