Question 11

 

 

How does photosynthesis convert light energy into chemical energy? How are the light and dark reactions of photosynthesis coupled? And, how have plants adapted the process of photosynthesis to different environmental conditions? [Chapter 10]

 

Photosynthesis in Nature (read 176-178)

 

Plants and other autotrophs are the producers of the biosphere.

 

Choloroplasts are the sites of photosynthesis in plants.

 

The Pathways of Photosynthesis (read 179-194)

 

Evidence that chloroplasts split water molecules enabled researchers to track atoms through photosynthesis.

 

The light reactions and the Calvin Cycle cooperate in converting light energy to the chemical energy of food.

 

The light reactions convert solar energy to the chemical energy of ATP and NADPH.

 

The Calvin Cycle uses ATP and NADPH to convert CO2 to sugar.

 

Alternative mechanisms of carbon fixation have evolved in hot, arid climates.

 

Photosynthesis is the biosphere’s metabolic foundation.

 

 

 

John C. Murphy

           Science

Phone:  (815) 436-3200, ext. 2120

 

jmurphy@learningcommunity202.org

 


 

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