8-2 Directed Reading - Weebly



Name:_________________ Hour:______

8-3 Directed Reading- Use your book and notes to complete

1. When were the requirements for photosynthesis discovered and where does photosynthesis take place?_________________________________________________________________________________ ______________________________________________________________________________________

2. What is photosynthesis? ________________________________________________________________

a. Define: Thylakoid- _______________________________________________________________

b. Granum- ______________________________________________________________________

c. Grana- ________________________________________________________________________

d. Stroma- _______________________________________________________________________

e. Photosystems- __________________________________________________________________

______________________________________________________________________________

3. The reactions of photosystems can be broken into two parts, what are they? ______________________

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4. Where do light dependant reactions take place? _____________________________________________

5. Where do light independent reactions take place? ____________________________________________

6. What happens when sunlight excited electrons in chlorophyll? _________________________________

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7. Why does your book compare the high-energy electrons to a red-hot coal? _______________________

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8. Instead of using a pan or bucket that you would use to “transport” a red-hot coal, what do electrons use? ____________________________________________________________________________________

9. What is a carrier molecule and what does it do? _____________________________________________

_____________________________________________________________________________________

10. What is this process known as? __________________________________________________________

11. What are the electron carriers known as? __________________________________________________

12. What is NADP+ and what is its job? ______________________________________________________

_____________________________________________________________________________________

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13. What is one way that some of energy from the sun can be trapped in chemical form? ________________

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14. What can NADPH then do? _____________________________________________________________

15. What are high-energy electrons used for? __________________________________________________

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16. DRAW and LABEL figure 8-7.

Use Figure 8-7 Photosynthesis: An Overview to answer the following questions

17. What materials come into the chloroplasts that are used in the light-dependent reactions?

________________________________________

18. What material comes into the chloroplasts that are used in the Calvin Cycle?_________________

19. What material moves out of the chloroplast from the light-dependent reaction? ________________

20. What materials move out of the chloroplast from the Calvin Cycle? _________________________

21. What materials move from the light- dependent reactions to the Calvin Cycle? ________________

____________________

22. What materials move from the Calvin Cycle back to the light-dependent reactions? ____________

____________________

23. Explain the light-dependent reactions- _______________________________________________

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24. Explain the Calvin Cycle- _________________________________________________________

Use the Rates of Photosynthesis graph on page 213 to answer the following questions:

25. When light intensity is below 200 µmol photons/m2/s, do sun plants or shade plants have a higher rate of photosynthesis? _______________________________

26. Does the relationship in question 22. change when light intensity increases above 400 µmol photons/m2/s? Explain. _______________________________________________________

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27. The average light intensity in the Sonaro Desert is about 400 µmol photons/m2/s. According to the graph, what would be the approximate rate of photosynthesis for sun plants that grow in this environment? ______________________________________________________________

28. How do the two sets of photosynthetic reactions work together? ________________________

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29. Describe a few factors that affect photosynthesis- _____________________________________

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