Stage 1 and Stage 2 of Photosynthesis

Step 3 : Light reactions

2e- from step 1 are passed from molecule to molecule down the electron transport chain Along the way their energy is used to pump more hydrogen (H+) into the thylakoid membrane

Step 2: Calvin Cycle (reduction)

3PG uses energy in NADPH and ATP to rearrange itself into G3P One G3P molecule becomes glucose, the rest go to step 3 3PG + energy (NADPH/ATP) = G3P (glucose - C6H12O6)

Step 6: Light reactions

All the Hydrogen pumped out during the 2 electron transport chains flows from the thylakoid membrane to the storm, making the ATP in the process ATP is saved to be used in stage 2

Step 1: Calvin Cycle (carbon fixation)

Carbon dioxide combines with a 5 Carbon compound (RuBP) to form 3PG CO2+RuBP = 3PG

Step 3: Calvin Cycle (regeneration)

G3P leftovers use ATP to become RuBP to be used in step 1... and the cycle repeats G3P +energy (ATP) = RuBP

Step 2: Light reactions

Happens at the same time as step 1 Light energy splits water to make 2e- to replace those lost in step 1 Oxygen - released as waste 2 hydrogen ions left are used later

Stage 2: Calvin Cycle (repeats itself)

Happens in stroma and doesn't require light NAPDH and ATP from stage 1 will be used to make glucose 3 step chemical process

Step 1: Light reactions

Light (photon) strikes chlorophyll and is absorbed by 2 electrons (2e-) 2e- now have enough energy to leave the Chlorophyll molecule

summary of light reactions

Light energy from the sun is converted to chemical energy in NADPH and ATP

Step 5: Light reactions

Re-energized use to make NADPH, an energy molecule used later in stage 2

stage 1: Light Reactions

uses water and sunlight to make ATP and release oxygen 6 step chemical process from light to ATP

Step 4: Light reactions

when the 2e- reach the end of the electron transport chain their energy is used up Here they are re-energized by more light and sent down a 2nd electron transport chain