Photosynthesis PPT

where?

green parts of plants, chloroplasts in cells, thylakoid membrane (first part), stroma (second part),

main outcome

sugar (63P)

two parts of photosynthesis

light reactions, Calvin cycle

light reactions

use solar power to generate AP and NADPH, uses H2), releases O2

Photosystems PS

harvest energy from photons of light, two photosystems in the light reactions (PS2, PS1)

things to know about light reactions

Energy from light allows chlorophyll in PS 2 to steal electrons from water, releasing O2. Electrons follow electron transport chain (ETC), releasing some energy, building a H+ gradient-this is used to make ATP (chemiosmosis). ETC-energy powers an enzyme that gives e to NADP+, yielding NADPH

Calvin Cycle

Uses the ATP and NADPH made in the light reactions to make sugar for the plant. CO2 is reduced to make the sugar. NADPH is oxidized back to NADP+