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Flashcards in Photosynthesis Test Deck (4):

Chemical Equation for Photosynthesis

6C02 + 6H20 + Light Energy = Glucose


Light Dependent Reaction

2 Photosystems:
Photosystem 1: electrons are used to produce NADPH.
Photosystem 2: Transfers energized electrons to plastoquinone via an electron transport chain. It releases energy to transport protons across the thylakoid membrane. A proton gradient forms with a higher concentration inside than outside. The also represents the potential energy that the cell uses to produce ATP.


Light Independent Reactions

happen with or without light. They use the Calvin Cycle which has 3 phases; fixation, reduction, and regeneration. The fixation phase, CO2 from the atmosphere combines with a 5 carbon molecule (RuBP). This is how carbon becomes usable for life systems and is called carbon fixation.

The reduction phase starts with 3 phosphyglycerates and is reduced by elections from NADPH. This is G3P. Two of these molecules form Glucose.

The regeneration phase prevents the chloroplast from running out of RuBP which is required to make glucose.


Photosynthesis and Cellular Respiration

Photosynthesis is when plants use CO2 to produce sugars and other complex molecules.

Cellular Respiration is a complementary process and converts oxygen and sugar into CO2 and water. Some energy is released to make ATP and the rest is lost as heat.