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Chapter 10 part II

Photosynthesis

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Outline

• What is Photosynthesis?

• Properties of light• What are waves?• Useable light colors

• Chloroplast structures

• Light Reaction• Dark Reaction

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What is Photosynthesis?

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Chloroplast

Mitochondria

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Photosynthesis overview• Plants are able to synthesis

glucose by using carbon dioxide gas and water as the raw materials.

• Sunlight is used as the energy to power this transformation

• This chemistry takes place in the chloroplast of the plant cell.

• A special chemical called Chlorophyll makes this possible.

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Properties of Sunlight• Sunlight is a form of energy• Energy travels in electromagnetic

waves that vary in size• Colors are nothing more then different

size electromagnetic waves.• Objects that exhibit a color have that

color because it is the wave that is reflected.

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What is a wave?

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Electromagnet spectrum

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Light and plants

•Plants don’t really need green light because it’s the light wave that is reflected off the plant

•Colors ( wave lengths) of red, blue, violet are more important to most plants.

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Action spectrum

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What traps the light?

•Inside the chloroplast are chlorophylls that are able to trap the energy from the electromagnetic waves.

•This trap energy is used to combine certain elements into a compound

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Cholorplast

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Photosynthesis- Light reaction

Each type of Chlorophyll will absorb a different wave length.

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Photosynthesis - Light Reaction

Chlorophyll

E

Light

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Photosynthesis - Light Reaction

Chlorophyll

E

Light

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Photosynthesis - Light Reaction

Chlorophyll

E

Light

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Photosynthesis - Light Reaction

Light

Chlorophyll

E

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Photosynthesis - Light Reaction

Light

Chlorophyll

EWater

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Photosynthesis - Light Reaction

Light

Chlorophyll

E

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Photosynthesis - Light Reaction

Light

Chlorophyll

E

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Photosynthesis - Light Reaction

Light

Chlorophyll

E

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Photosynthesis - Light Reaction

Light

Chlorophyll

EFree Oxygen

H+

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Photosynthesis - Light Reaction

Light

Chlorophyll

EFree Oxygen

H+

ATP

NADP

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Photosynthesis- Dark Reaction

E

H+

ATP

NADP

Calvin Cycle

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Dark Reaction-2

H+

ATP

NADP

Calvin Cycle

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Dark Reaction-3

H+

ADP

NADP

Calvin Cycle

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Dark Reaction-4H+

ATP

NADP

Calvin Cycle

H+

Carbon Dioxide

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Dark Reaction-5H+

ATP

NADP

Calvin Cycle

H+

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Dark Reaction-6

H+

ATP

NADP

Calvin Cycle

H+

Carbon

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Dark Reaction-7

H+

ATP

NADP

Calvin Cycle

H+

CarbonProcess repeated six times