Using sunlight to make food (sugar) 6CO2 + 6H2O ­­> C6H12O6 + 6O2 Opposite Organism that makes it's own food An autotroph Uses light to make its own food Pigment that captures photons of light Layer of tissue in a leaf where photosynthesis occurs Pores on the underside of leaves where gas exchange occurs Where the dark reaction occurs in a chloroplast Discs in a chloroplast where the light reaction occurs Stacks of thylakoids Using light to make ATP and NADPH Fixing CO2 to make sugar using ATP and NADPH CO2 bonding to RUBP to make a 6C molecule that splits Particle of light Group of pigments that capture light in the thylakoid How ATP is made in the light reaction 1 Inner membrane Thylakoid Stroma Grana CO2 through the stomata, H2O through the roots water splitting CO2 H2O To make ATP and NADPH for the dark reaction Light is required to excite the electrons To make sugar (G3P) ATP and NADPH are used in the dark reaction ATP and NADPH Pigment molecules Water splitting The sun (light) Another pigment molecule NADP+ 2 Photophosphorylation They are used in the dark reaction which takes place in the stroma Carbon fixation ­­ CO2 bonds with RuBP = 6C molecule that splits Reduction ­­ PGA gets reduced by NADPH with the help of ATP to make G3P Regeneration ­­ 5 G3P reform into 3 RuBP which uses 3 ATP to do so 6 (3 for each G3P) Rubisco is the enzyme that bonds CO2 to RuBP. If this didn't work, then no ATP's or NADPH's would be used. Therefore, the plant would eventually run out of raw materials (ADP, P, and NADP+). It would eventually stop. 3 4 5 6 Photosynthesis Disc lab 7