CHAPTER 6. Photosynthesis and the Chloroplast. Introduction (1). The earliest living organisms were heterotrophs , which survived on nutrients from the environment. Autotrophs manufacture organic nutrients from CO 2 and H 2 S.
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Photosynthesis and the Chloroplast
CO2 + H2O (CH2) + O2
6 CO2 + 12 H2O C6H12O6 + 6 H2O + 6 O2
2 H2O 4 H+ + O2 + 4 e–
2 H2O + 2 NADP+ O2 + 2 NADPH