Name: ______Period: ______

Chapter 6 Photosynthesis

Section 6-1 Capturing Light Energy

  1. All organisms require ______to carry out their life functions.
  2. ______is the ultimate energy for all life on earth.
  3. During photosynthesis, the energy from the sun is stored within ______compounds, mainly the sugar ______.
  4. What organisms can carry on photosynthesis?
  5. What gas is used by autotrophs & what gas is produced?
  6. What organisms release stored energy from organic compounds through cellular respiration?
  7. What are the light reactions of plants and in what organelle do they occur?
  8. Flattened sacs in chloroplasts are known as ______and are ______to each other.
  9. Thylakoid sacs in chloroplasts are called ______.
  10. What gel-like solution surrounds the thylakoids inside the chloroplast?
  11. Name the 7 colors that make up the visible spectrum.
  12. What 3 things can happen to light that strikes an object?
  13. What are pigments & what is their function in plants?
  14. Is red light reflected or absorbed by an object if the object appears red to your eyes?
  15. Name the most important chloroplast pigment & tell the 2 most important types of this pigment.
  16. Only ______is directly in capturing light energy.
  17. Chlorophyll b is an example of an ______pigment in plants.
  18. Name another accessory pigment & tell what colors it includes. When could you see these colors?
  19. Chlorophyll is most abundant in the ______of a plant, while accessory
    pigments appear more in the ______and fruits.
  20. The ______and ______pigments are grouped
    into clusters in the thylakoid membrane.
  21. Name the 2 types of photosystems.
  22. The light reactions start when ______pigments absorb ______.
  23. Absorbed light is passed to a pair of ______pigment molecules inphotosystem ______.
  24. When light energy is absorbed by chlorophyll a molecules, what happens to its electrons?
  25. Once these electrons become "excited," they have enough energy to do what?
  26. What are the chemicals called that pick up these freed electrons & where are they located?
  27. These electrons lose ______as they are passed through a series of molecules
    called the ______chain.
  28. Photosystem I chlorophyll molecules also absorb ______, and its electrons
    eventually combine with ______to form NADPH.
  29. What would happen if the electrons lost from photosystem II weren’t replaced?
  30. ______provides the replacement electrons for photosystem II when water is ______.
  31. Write the equation for the splitting of a water molecule.
  32. What important gas is released when water is split?
  33. ______or energy for a cell is synthesized during the light reactions in a process
    called ______.

Section 6-2 Calvin Cycle

  1. The ______cycle is the second set of photosynthetic reactions that uses energy
    stored in ______and ______to make ______compounds.
  2. Carbon atoms from ______are "fixed" into organic compounds in the Calvin
    cycle in a process called carbon ______.
  3. In what part of the chloroplast does the Calvin cycle occur?
  4. Carbon dioxide combines with ______to make two molecules of ______.
  5. PGA is converted into ______, ADP, ______, andphosphate.
  6. Carbohydrates made from PGAL in the Calvin cycle include the monosaccharides
    ______and ______, the disaccharide ______, and polysaccharides such as ______, ______, and ______.
  7. Write the balanced equation for photosynthesis. (See bottom of page 118.)
  8. Plants that fix carbon through the Calvin cycle are called what type of plants?
  9. What are stomata & where are they located?
  10. When would plant cells need to close or partially close their stomata?
  11. Name 2 alternate carbon-fixing pathways used by plants in hot climates.
  12. Plants that close their stomata during the hottest part of the day thus fixing carbon into four
    carbon compounds are called ______. Name three.
  13. CAM plants open stomata at ______and close during the ______.
  14. Name 3 environmental factors that affect the rate of photosynthesis.