1. Take a white board and marker from the front
Light Reaction Review
Take a white board and marker from the front

2. Q1: Where do the light reactions take place?
In the stroma
Outside of the chloroplasts
In the thylakoid membranes
Only in chlorophyll molecules

3. Q2: Which of the following is inside the thylakoid membrane
Electron transport chain
Photosystem I
ATP synthase
All of these

4. Q3: What is letter A?
Water
Photon of Light
ATP
Photosystem

5. Q4: What does letter B depict
Reaction Center
Antenna
Photosystem I
Photosystem II

6. Q5: Where does the photon of light first hit?
the reaction center of photosystem I
the reaction center of photosystem II
the antenna of photosystem I
the antenna of photosystem II

7. Q6: Which letter in the picture contains the reaction centerM C D

8. Q7: How does the photon of light get into the reaction center?
That is where the photon originally goes
The photon never goes to the reaction center
The antenna molecules will pass the photon’s energy to the reaction center

9. Q8: What are all of the pigments that are in the antenna?
Chlorophyll a and chlorophyll b
Chlorophyll b and xanthophyll
Chlorophyll b, carotene and xanthophyll
Chlorophyll b, carotene, xanthophyll and chlorophyll a

10. Q9: Which region of the visible spectrum is not absorbed well by chlorophyll?
blue
green
violet
red

11. Q10: What happens in the reaction center?
The photon of light gets excited and is passed onto the primary acceptor
The photon of light excites a proton and the proton is passed onto the primary acceptor
The photon of light excites an electron and it immediately enters the ETC (electron transport chain)
The photon of light excites an electron and the electron is passed to the primary acceptor

12. Q11: Which letter represents the primary electron acceptor?D

13. Q12: How is the electron replaced in photosystem II?
The electron from PSI exits the ETC and replaces it.
Water is split and the H+ ions enter the photosystem
Water is split and the electrons enter the photosystem
Electrons enter from the stroma

14. Q13: Which side is the lumen?K. L

15. Q14: What happens to the electron as it goes down the ETC?
The electron gains energy as it moves through the chain
The electron doesn’t do anything, just remains in the chain
The electron releases energy as it moves through the chain

16. Q15: How do H+ ions cross the membrane?
They take the energy expelled from the electrons and cross
They do not, electrons cross the membrane
They give energy to the electrons in order to cross

17. Q16: Why do H+ ions require energy to go from the stroma into the lumen?
There is a high concentration of H+ ions in the stroma and low in the lumen
There are equal amounts of H+ ions in the stroma and lumen
There is a low concentration of H+ ions in the stroma and high in the lumen

18. Q17: What happens to the H+ ions in the lumen?
They want to diffuse out because they want to move from high  low
They are content to stay there forever
They want to diffuse out because they want to move from low  high

19. Q18: Why are there so many H+ ions in the lumen?
Because all of them cross from the stroma
When water is split, the H+ remain in the lumen

20. Q19: How do the H+ leave the lumen and enter the stroma?
Through the ETC chain
They diffuse through the phospholipid bilayer
They leave through ATP synthase

21. Q20: Which letter depicts ATP synthase enzyme?G B J M

22. Q21: What happens with ATP synthase?
The H+ release energy that ADP absorbs to create ATP and then they are available for more reactions
The H+ ions are absorbed into ADP to create ATP
The H+ release energy that ADP absorbs to create ATP, and then they disintegrate

23. Q22: Where is photosystem I?B G M

24. Q23: What is the path of a photon’s energy?
Antenna  reaction center  ETC
reaction center  ETC
Antenna  reaction center  primary electron acceptor  ETC
Antenna primary electron acceptor reaction center  ETC

25. Q24: How is NADPH created?
NADP+ and an electron from the ETC and an H+ ion from the lumen
NADP+ and 2 electron from the ETC and an H+ ion from the lumen
NADP+ and 2 electron from the stroma and an H+ ion from the stroma
NADP+ and 2 electrons from the ETC and an H+ ion from the stroma

26. Q25:How is the electron lost in PSI replaced?
The electron from PSII flows down the ETC and enters PSI
The electrons from the lumen enter PSI
The electrons in the stroma enter PSI
When water is split, the electrons enter PSI