Across
- 3. – First photosystem involved in light reactions
- 8. – Barriers that separate different areas in cells
- 11. – Structures that control movement of substances
- 13. – Negatively charged particles energized by light
- 14. – Groups of pigments and proteins that absorb light
- 16. – Molecules that absorb light energy
- 18. – Energy source that powers photosynthesis
- 19. – Charged particles involved in energy storage
- 20. – Membrane stacks where light-dependent reactions occur
Down
- 1. – Molecule that carries high-energy electrons
- 2. – Element that forms H⁺ ions inside thylakoids
- 4. – Gas released as a by-product of splitting water
- 5. – Molecule split to provide electrons and hydrogen ions
- 6. – Positive and negative particles kept separate
- 7. – Main green pigment that captures light energy
- 9. – State in which oxygen is released into the air
- 10. – Organelles where photosynthesis takes place
- 12. – Build-up of charge across a membrane
- 15. – Energy-carrying molecule produced in light reactions
- 17. – What is transferred through excited electrons