1. PHOTOSYNTHESIS
REVIEW ANSWERS

2. GREAT OVER ALL VIDEO – BOZEMAN BIOLOGY
PHOTO SONG

3. Identify the stroma E

4. Which of these equations best summarizes photosynthesis?
A. C6H12O6 + 6 O2 —> 6 CO H2O
B. C6H12O6 + 6 O2 —> 6 CO2 + 6 H2O + Energy
C. 6 CO2 + 6 O2 —> C6H12O6 + 6 H2O
D. 6 CO2 + 6 H2O —> C6H12O6 + 6 O2
E. H2O —> 2 H+ + 1/2 O2 + 2e-

5. Chlorophyll and Light Energy
3. When thinking of the balanced equation for photosynthesis, what are the 2 conditions necessary for photosynthesis to occur?
Chlorophyll and Light Energy

6. 4. Where does the Calvin cycle occur?

7. The light reactions of photosynthesis use _____ and produce _____.
A. NADPH ... NADP+
B. water ... NADPH
C. carbon dioxide ... oxygen
D. carbon dioxide ... sugar
E. NADPH ... oxygen

8. 6. Name the 7 colors of the visible light spectrum in order from most energy to least energy.
V I B G Y O R

9. 7. Which of these phosphorylates ADP to make ATP?

10. 9. _____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment.

11. 12. Differentiate between a chemoautotroph and a photoautotroph.
Chemoautotroph = An organism that needs only carbon dioxide as a carbon source but that obtains energy by oxidizing inorganic substances.
Photoautotroph
An organism that harnesses light energy to drive the synthesis of organic compounds from carbon dioxide.

12. 14. The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from _____.
Splitting of water

13. 15. Which of these wavelengths is least useful for photosynthesis?
green
yellow
blue
orange
red

14. 19. When bright light is passed through a container of freSh chlorophyll, the result is shown here. Explain what happening? Be specific.
The e-s are excited and leave their ground state. There is no acceptor molecule to catch the e-s , so they fall back down to their ground state and release their energy as red and infrared.

15. 20. Name this entire unit pictured here.
Photosystem

16. 21. A new flower species has a unique photosynthetic pigment
21. A new flower species has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment?
A) red and yellow
B) blue and violet
C) green and yellow
D) blue, green, and red
E) green, blue, and violet

17. 22) The reaction-center chlorophyll of photosystem I is known as P700 because
A) there are 700 chlorophyll molecules in the center.
B) this pigment is best at absorbing light with a wavelength of 700 nm.
C) there are 700 photosystem I components to each chloroplast.
D) it absorbs 700 photons per minute.

18. 23. In the thylakoid membranes, what is the main role of the antenna pigment molecules?
A) to split water and release oxygen to the reaction-center chlorophyll
B) to harvest photons and transfer light energy to the reaction-center chlorophyll
C) to synthesize ATP from ADP and Pi
D) to pass electrons to ferredoxin and then NADPH
E) to concentrate photons inside the stroma

19. 26. Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?
A) the splitting of water
B) the absorption of light energy by chlorophyll
C) the flow of electrons from photosystem II to photosystem I
D) the synthesis of ATP

20. 27. Noncyclic photophosphorylation uses light energy to synthesize
A) ADP and ATP.
B) ATP and P700.
C) ATP and NADPH.
D) ADP and NADP.
E) P700 and P680.

21. Reaction center 30. Name this specific part of a photosystem.
30. Name this specific part of a photosystem shown by red arrow.
30. Name this specific part of a photosystem.
Reaction center

22. Photosynthesis is a redox
reaction in which ____________ is
reduced and ______________ is
oxidized.
CO2
H2O

23. blue
absorbance
violet blue green yellow red
36. Here is an absorption spectrum for an unknown pigment molecule. What color is the pigment?

24. PHOTOLYSIS – splitting of water
The chlorophyll molecule known as
P680 has its electron “holes” filled by
electrons from____________________.
PHOTOLYSIS – splitting of water

25. 38. Chloroplasts could make carbohydrates in the dark if they are provided these 3 compounds.
ATP
NADPH
CO2

26. They go down the ETC and end up in PS I
42. What happens to the e-s that leave photosystem II?
They go down the ETC and end up in PS I

27. 43. Name the type of graph below and explain what specific information it gives.
Called an action spectrum; it shows what wavelengths of light are mostly uses to carry out photosynthesis.

28. 44. Locate photosystem I?

29. 45. Where is photolysis occurring?

30. 46. Where is the P680 molecule?

31. 47. Where does chemiosmosis occur?

32. 48. Where is ATP made?

33. 49. Where is NADPH made?

34. 50. Where are primary acceptor molecule(s) located?

35. 51. Where is the cytochrome complex located?

36. Reaction center
Antenna molecules = all others except RXN center
52. Differentiate between the antenna molecules and the reaction center.

37. 53. In which direction are protons flowing due to chemiosmosis
53. In which direction are protons flowing due to chemiosmosis? Choose the correct red arrow.

38. 56. Visible light has a wavelength range of A. 400-700 nanometers. B
56. Visible light has a wavelength range of  A.  nanometers. B.  nanometers. C.  nanometers. D.  nanometers. E.  ,000 nanometers.
                                                                                                             A

39. 58. Explain the difference that occurs when white light hits each of these objects.
solid
                                                                                                            
Trans-parent
In the solid object all colors of ROYBIV are absorbed except G which is reflected. In the transparent object all colors of ROYBIV are also absorbed but G is transmitted.

40. THE END