PHOTOSYNTHESIS. Using Light to Make Food. Photosynthesis is the most important chemical process on earth because:. It provides food for virtually all organisms SWEET!!!!. BIG PICTURE: Photosynthesis .
Using Light to Make Food
Light energy is used to make sugarand other food molecules from carbon dioxide and water
How does this equation compare to the cell respiration one?
Photosynthesis: An Overview of Photosynthesis (click)
2. Upper Epidermis
4. Mesophyll-cells containing chloroplasts
3. Lower epidermis
Covers and protects
see stoma –in lower epidermis only
Waxy, waterproof coating (to retain H2O)
O2 ,CO2, H20 vapor go in/out
Xylem-(blue) carries water
Phloem (thicker cell wall)-(yellow) carries food
http://academic.kellogg.cc.mi.us/herbrandsonc/bio111/animations/0021.swf (really nice)
See oxygen bubbles coming from the Elodea
What conditions are best?
Stromal lamella = connect grana
D. Outer Membrane
FIXATION = make in a usable form
Distance between crests of two waves
Λ = symbol for wavelength
The greater the energy
Figure 7.11Page 122
Electron flow through transfer chain sets up conditions for ATP formation at other membrane sites.
electron transfer chain
Figure 7.12Page 122
1. Light energy is absorbed
2. Electrons excited
3. Energy from ETC used to make ATP and NADPH
Cuticle Epidermis Guard cells Palisade PhloemXylemSpongy MesophyllStomata Bundle Sheath
A movement of electrons between photosystem II and photosystem I.
B oxidation of water
C oxidation of NADPH
D absorption of photons by chloroplast pigments
E higher concentration of H+ inside versus outside the thylakoid membranes