What is a photosystem?
27. Name the 2 types of photosystems. 28. The light reactions start when __________________ pigments absorb ______________. 29. Absorbed light is passed to a pair of ________________________ pigment molecules in photosystem ________. 30. When light energy is absorbed by chlorophyll a molecules, what happens to its electrons? 31. Once these electrons become “excited”, they have enough energy to do what? 32. What are the chemicals called that pick up these freed electrons & where are they located? 33. These electrons lose _________________ as they are passed through a series of molecules called the ______________________________________ chain. 34. Photosystem I chlorophyll molecules also absorb ________________, and its electrons eventually combine with ______________________ to form NADPH. 35. What would happen if the electrons lost from photosystem II werent replaced? 36. ________________________ provides the replacement electrons for photosystem II when water is ______________________
