Chapter 17 Reactions Photosynthesis Chapter 17 Reactions Photosynthesis Photosynthesis is the process by which most of the energy in the biosphere is produced. Most of the carbon dioxide and the production of oxygen in the atmosphere results from photosynthesis.
Photosynthesis consists of a set of light and dark reactions.
Dark reactions occurs all the time and not just the dark. The site of photosynthesis is the chloroplast, which is under the surface of the leaf. Chloroplasts are semi-autonomous with its own DNA for someproteins and ribosomes. The light reactions occur within or on the thylakoid membrane and the dark reactions occur within the stroma. Together these two systems create a pH gradient across the chloroplast membrane which drives ATP production.