Concept 2: Analyzing the Processes of PhotosynthesisRefer to pg 83-92 in Holtzclaw, Ch 10 in Campbell and media resources

Refer to pg 297-299 in Holtzclaw, Lab Inv 5 in Lab ManualYou must know:

The summary equation of photosynthesis including the source and fate of reactants and products

How the leaf and chloroplast anatomy relates to photosynthesis

How photosystems convert solar energy to chemical energy

How linear electron flow in the light reactions results in the formation of ATP, NADPH, and O2

How chemiosmosis generates ATP in the light reactions

How the Calvin cycle uses the energy molecules of the light reactions to produce G3P

The Light Reactions

Light energy excites electrons in ______________

Removal of _____________from H2O

o Formation of ________

Electron Transport Chain

o Reduction of NADP+ to ______________

Proton Motive Force

ATP Synthase to produce ______

CO2 + H2O → C6H12O6 + O2

1. Light Reactions “photo”2. Calvin Cycle “synthesis”

The Electron Transport Chain

1. 4.

2. 5.

3. 6.

Unlike in cellular respiration, the proton motive force generated by the light reactions in photosynthesis happens in three ways… Can you remember the three ways?

1. Electron transport chain powering the active transport of H+ into the _____________________

2. H+ produced in the ____________________from the splitting and oxidation of water

3. Removal of H+ from _____________during the reduction of NADP + to NADPH

The whole point of the light reaction was to transfer light energy to chemical energy in the form of:

electrons in NADPH

ATP

Why?

The Calvin Cycle

CO2 enters as a gas through the stomata (openings) of the leaves

Through the power of NADPH and ATP, CO2 gets converted into an __________________: a 3-carbon sugar called glyceraldehyde-3-phosphate (G3P)

Can be converted to glucose, sucrose, starch, etc…

The Electron Transport Chain

1. 4.

2. 5.

3. 6.

Chemiosmosis comparison

Cellular Respiration vs. Photosynthesis:

Phase 1 –

Phase 2 –

Phase 1 –

Phase 2 –

PracticeTry #12 – 15, 17-19, 21-22 p. 91-92Go over Comparison ChartsTry animation activities (Campbell Online)

Read about CAM plants and C4 plants for next day:

P. 88-89 HoltzclawP. 200-202 Campbell

Activity: Photosynthesis in Dry Climates (Campbell Online)