AP Biology Photosynthesis Part 2.

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Presentation transcript:

AP Biology Photosynthesis Part 2

Valence Electrons

Energy and Atoms Third energy level (shell) Energy absorbed Second energy level (shell) First energy level (shell) Energy lost Atomic nucleus

Photosynthesis Light Reaction

Non-cyclic electron flow

Cyclic electron flow

Where it is occurring?

More surface srea = More energy

Water and Photosystems 1 and 2

(How many electrons are in Mg’s outer shell (How many electrons are in Mg’s outer shell?) Chlorophyll A or B molecule.

Answer: 2 Those 2 electrons will leave Mg and enter into the Electron Transport Chain.

Photosystem and collecting sunlight energy.

Non-cyclic electron flow

Redox reaction

H+ (protons) being pumped into the thylakoid to “build” potential energy.

Non-cyclic electron flow

Cyclic electron flow

Cytochrome C ALL organisms have this important proton pumping protein

Potential Energy

Turning Potential energy into Kinetic energy to make ATP

Chemiosmosis and Energy Coupling.

Photosynthesis Light Reaction converts Sunlight into chemical energy

Calvin Cycle uses chemical energy to build sugar

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