Two Stages of Photosynthesis:

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Presentation transcript:

Two Stages of Photosynthesis: 1) the LIGHT REACTIONS 2) the CALVIN CYCLE (a.k.a. the light-independent reactions)

LIGHT DEPENDENT REACTIONS: • convert solar energy  chemical energy • light is absorbed by chlorophyll and drives a transfer of electrons and H from water to an acceptor called: NADP+ • water is split and O2 is produced as a waste product • NADP+ is reduced to NADPH…ALSO, ATP is generated via phosphorylation of ADP

LIGHT INDEPENDENT REACTIONS (Calvin Cycle): • CO2 from air is incorporated into organic molecules by carbon fixation • NADPH and ATP from the light reactions power the production of sugar

Locations of the Photosynthesis Reactions: • Light dependent reactions occur in the THYLAKOIDS • Light independent reactions occurs in the STROMA

Where is chlorophyll located? Stroma Granum Grana Thylakoid membrane

The oxygen that a plant releases comes from what reactant? Carbon dioxide Water Glucose Sunlight

The energy that is stored in glucose originally came from _____. ATP & NADPH Pyruvate Wavelengths of light ATP, NADPH, & Wavelengths of light

The ATP that is needed in the Light Independent Reactions needs to be produced where? Thylakoid membrane Stroma Granum Stomata