Biolo1100 Chapter 6 Photosynthesis: Acquiring Energy from the Sun
  1. Photosynthesis takes place in the leaves of plants to transform light energy into the chemical energy of carbohydrates   via pigments.











     
  2. This process involves two steps: the light- dependent   reactions and the light- independent   reactions (Calvin cycle).

     
  3. Light-dependent reactions
     
    • Groups of pigments are embedded in thylakoid   membranes and organized into photosystems   to capture light energy in electrons  .



       
    • Two electron   transport systems harvest the energy in the electrons to produce ATP   and NADPH  .


     
  4. The Calvin cycle uses products of the light-dependent reactions, ATP   and NADPH  , to build carbohydrates from CO2.