Photosynthesis

Basic Photosynthesis

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Chlorophyll

Pigments that absorbs light.

Also…Carotene

(orange)Xanthophyll

(yellow)Anthocyanin

(blue/purple)

Chlorophyll absorbs red and blue light, while reflecting

green

Chlorophyll a vs. b

They complement each other.

Shade of green is dependent on ratio of a to b.

Intermission

Two Reactions

Light ReactionDark Reaction

Also known as Light Independent Reaction

Also known as the Calvin Cycle

Light Reaction

Occurs in the granum (on the thylakoid (in the lumen (where chlorophyll is))).

Light splits water to make oxygen, a proton, and ATP.

Equation:12H2O + 12NADP + 18ADP → 6O2 + 12NADPH +

18ATP

Light Independent Reaction

Occurs in stromaATP and H+ are used to turn CO2 into glucose.Equation:

ATP + NADPH + CO2 C6H12O6 + ADP + NADP

Starch

Glucose is stored as starch (carbohydrate)Examples of starch include:

“Every violation of truth is not only a sort of suicide in the liar, but is a stab at the health of human society.”

Ralph Waldo Emerson (1803-1882)