Chapter 22 Crossword Puzzle

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Across
  1. 3. Orange or yellow pigment that protects chlorophyll by dissipating excess energy.
  2. 6. Chlorophyll complex absorbing light at 680 nm, initiating electron flow in Photosystem II.
  3. 7. Chlorophyll complex absorbing light at 700 nm, the core pigment in Photosystem I.
  4. 8. Green organelle that captures light, found only in plant cells and certain algae.
  5. 9. Membrane-bound protein that shuttles electrons between Photosystem II and Photosystem I, helping to pump protons across the membrane (three words).
  6. 11. Key chlorophyll molecules that initiate electron transfer after absorbing light (two words).
  7. 13. Grouped stacks of light-absorbing disks within chloroplasts.
  8. 15. Structure composed of pigments that captures sunlight and channels energy to the reaction center (three words).
  9. 17. Synthase Enzyme that produces ATP by harnessing the flow of protons across a membrane.
  10. 18. Central chlorophyll site in a photosystem where energy conversion begins.
  11. 19. Flattened membrane sac where light absorption and electron transport occur.
  12. 20. The initial phase of photosynthesis that directly depends on photons to generate energy-rich molecules (two words).
  13. 21. Process where light-excited electrons leave the reaction center, initiating electron flow (three words).
Down
  1. 1. Light-absorbing complex involved in the second part of the electron transport chain in photosynthesis, with a key pigment absorbing at 700 nm (two words).
  2. 2. Green pigment crucial for absorbing sunlight in photosynthesis.
  3. 4. plants use to safely dissipate excess light energy as heat (three words).
  4. 5. Gradient of hydrogen ions across the thylakoid membrane, used to power ATP synthesis (three words).
  5. 10. The pathway representing energy changes in electron transport, resembling the letter “Z” (two words).
  6. 11. The fluid matrix in which the Calvin cycle takes place within a chloroplast.
  7. 12. Process that recycles electrons in Photosystem I to generate extra ATP without NADPH production (two words).
  8. 14. The photosystem that splits water molecules and releases oxygen, absorbing light at 680 nm (two words).
  9. 16. Cluster within Photosystem II that splits water molecules to release electrons and oxygen (three words).