Why is photosynthesis so important to life on earth?

1.  Why is photosynthesis so important to life on earth?

2.  Write the equation for the overall chemical reaction of photosynthesis. 

3A. Label the chloroplast below with the following terms: inner and outer membranes, stroma, thylakoid, and granum. 

B.  Where do the light reactions occur? 

C.  Where does the Calvin cycle occur?

4.  List several pigments found in chloroplasts.  How are these pigments used in photosynthesis?

5.  Look at the absorption spectrum below.  What wavelengths of light are best absorbed by these pigments?  What wavelengths of light are absorbed the least?

6.   Explain why leaves appear green.

7A. Where do the light reactions of photosynthesis occur?

B. What are the reactants and products of the light reactions?

C.  Describe how light energy is converted into usable energy in the light reactions.  Include what molecules the light energy is converted into (the energy products).

D.  Why are these energy products important in photosynthesis?

8.  What is the difference between Rubisco and RuBP (Ribulose Bisphosphate)?  Why is rubisco the most abundant enzyme on earth?

9.  What are the four steps of the calvin cycle?  Briefly describe what happens at each step. 

10.  What sugar molecule is produced in the Calvin cycle?  What is the fate of these molecules in the cell

11.  Label Calvin Cycle diagram with the following terms: NADPH, ATP (two places), CO2, G3P, RuBP, Glucose.

12.  Label the summary diagram of Photosynthesis below with the following terms: O2, CO2, Light Energy, ATP, Calvin Cycle, H2O, Sugar, Light Reactions, NADPH.

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