Photosynthesis Converts solar energy into chemical energy Utilizes that to make ATP Generates O2 and organic molecules which are used in cellular respiration Energy Flow and chemical recycling in ecosystems Plant cell Have mitochondria Undergo cellular respiration Concept 10.1 Chloroplasts Site of photosynthesis Chlorophyll- pigment that absorbs light energy Thylakoids- contain chlorophyll Stomata Pores- can open and close By closing pores water won?t evaporate as quickly and CO2 can?t enter so sugars are made so won? Permits gas exchange CO2 enters O2 exits Found on underside of leaf Lights reactions Allow cell to make ATP Occur in thylakoids Split H2O Release O2 Produce ATP and NADPH+H+ ATP utilized to make sugars Calvin Cycle Energy requiring process