1 / 21

Fig. 9-8c, p. 142

pyruvate from cytoplasm. inner membrane. H +. electron transport system. Coenzymes give up electrons, hydrogen (H + ) to transport system. e −. NADH. acetyl-CoA. e −. NADH. H +. TCA cycle. H +. FADH 2. As electrons pass through system, H + is pumped out from matrix. e −.

eugenem
Download Presentation

Fig. 9-8c, p. 142

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. pyruvate from cytoplasm inner membrane H+ electron transport system Coenzymes give up electrons, hydrogen (H+) to transport system e− NADH acetyl-CoA e− NADH H+ TCA cycle H+ FADH2 As electrons pass through system, H+ is pumped out from matrix e− carbon dioxide Oxygen accepts electrons, joins with 2H+, forms water ATP synthesized 2 ATP Pi ADP oxygen H+ INTERMEMBRANE space H+ MATRIX H+ H+ flows in H+ Fig. 9-8c, p. 142

  2. Basis of photosynthesis: Light energy is used to transform C-O and H-O bonds into C-C and H-C bonds C C C C H H C C O O C C H + + Energy + Increased potential energy O Basis of respiration: Energy is liberated by transforming C-C and C-H bonds into C-O and H-O bonds H + + + Energy Decreased potential energy O

  3. Overall Respiration Reaction C6H12O6 + 6O2 6CO2 + 6H2O + energy 7 C-O bonds + 5 C-C bonds + 7 C-Hbonds + 5 H-O bonds + 12 O-O bonds 36 covalent bonds 24 C-O bonds + 12 H-O bonds 36 covalent bonds

  4. Photosynthesis Chapter 10

  5. Overall Photosynthesis Reaction 6CO2 + 6H2O + energyC6H12O6 + 6O2 Oxygen Glucose Carbon dioxide Water 7 C-O bonds + 5 C-C bonds + 7 C-H bonds + 5 H-O bonds + 12 O-O bonds 36 covalent bonds 24 C-O bonds + 12 H-O bonds 36 covalent bonds

  6. From seed to tree. Where does MOST of the weight gain come from? Nutrients from the soil? Water? Air? http://chlorofilms.org/index.php/crpVideo/display/videoid/47 http://www.youtube.com/watch?v=5W_aV_w3kko

  7. Location of photosynthesis in the plant cell Photosynthesis Cell wall CHLOROPLAST CHLOROPLAST MITOCHONDRIUM NUCLEUS MITOCHONDRIUM MITOCHONDRIUM CYTOSOL CHLOROPLAST CHLOROPLAST MITOCHONDRIUM Notes: 1) cytosol is the same as cytoplasm 2) not all of the plant cell structures and organelles are shown

  8. In photosynthesis:Chloroplasts Light microscopic image of chloroplasts in leaf cells http://botit.botany.wisc.edu

  9. intact chloroplast stroma granum stroma lammellae Fig. 10-4, p. 152

  10. Chloroplasts: structure two outer membranes thylakoids stroma lumen Fig. 3-12 (a), p. 40

  11. stroma Stroma lammellae granum Fig. 10-2a, p. 151

  12. Compare to respiration

  13. In respiration: Mitochondria inner membrane: site of electron transport chain ATP synthesis outer membrane Matrix: site of the TCA cycle cristae intermembrane space Fig. 9-8a, p. 142

  14. Division of Labor in Chloroplasts Green thylakoids • Capture light • Liberate O2from H2O • Form ATP from ADP and phosphate • Reduce NADP+ to NADPH Light reactions • Colorless stroma • Contains water-soluble enzymes • Captures CO2 • Uses energy from ATP and NADPH for sugar synthesis Dark reactions

  15. Light(-dependent) reactions

  16. Absorption spectra of Chlorophyll a and b 100 80 chlorophyll b Percent of light absorbed 60 40 chlorophyll a 20 0 400 500 600 700 Wavelength (nm) Fig. 10-5, p. 152

  17. Two Photosystems involved in trapping light energy * light-harvesting complex – combination of pigment molecules that act as light traps

  18. An extremely important element

  19. Pigment molecules in a light-harvesting complex (a complex of proteins and pigments) absorb light energy and transfer it to the reaction center, where a special chlorophyll a molecule loses an electron with increased potential energy. This high energy electron enters an electron transport chain. Pigments: chl: chlorophyll car: carotene light light harvesting complex Fig. 10-6, p. 153

  20. Fig. 10-7, p. 154 NONCYCLIC ELECTRON TRANSPORT e− P700* -0.6 sunlight energy Electron Transport System NADPH e− P680* e− 0 potential to transfer electrons (measured in volts) H+ + NADP+ electron transport system sunlight energy ADP + Pi e− e− P700 +0.4 Pigments from the light harvesting complex photosystem I released energy used to form ATP from ADP and phosphate +0.8 photosystem II e− H2O photolysis P680: reaction center of photosystem II P700: reaction center of photosystem I

More Related