Download presentation
Presentation is loading. Please wait.
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
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.