1. Photosynthesis

2. Overview of Photosynthesis importance: fix tons of CO 2 per year, used as energy for virtually all organisms similarity to ETC/ox-phos, PPP and tied to gng 2 phases light-dependent rxns (light rxns) light-independent rxns (dark rxns) location: chloroplast

3. Detailed Chloroplast Structure Stroma thylakoid disk granum (grana) thylakoid lumen

4. Light Reactions Antenna molecules chlorophyll carotenoids “Special Pair” Photosystems I and II

5. Photosystem I (P700) Not confident all molecules have been ID’d Major molecules Some of the reactions which occur NADPH produced

6. Major molecules ATP produced Photosystem II (P680)

7. Photophosphorylation Proton gradient develops as e – are transported high pH inside thylakoid lumen protons come out through Fo of “C- ATPase” (CFo) F1 rotor forms ATP (CF 1 )

8. Cyclic Photophosphorylation P700 only NO NADPH produced, only ATP Major molecules: P700, Fd, Cyt. B6, Cyt f, PC

9. ~Idealized Balanced Net Rxn O 2 + 4 ATP + 2 NADPH + 2 H + 2 H 2 O + 4 ADP + 4 Pi + 2 NADP + “8” h

10. Dark Reactions - C3 plants 3PG first molecule produced containing the fixed carbon rubisco- the most abundant protein in the world what gluconeogenic enzymes required to get Glc from 3PG?

11. Similar to non-oxidative part of PPP Regeneration of Ribulose-1,5-bisphosphate

13. C4 Plants The Hatch-Slack Pathway Molecular logic Division of labor Additional Rxns