PHOTOSYNTHESIS. Adenosine Triphosphate (ATP) Energy-storing compound Energy-storing compound Made up of an adenosine compound with 3 phosphate groups.

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PHOTOSYNTHESIS1Adenosine Triphosphate (ATP)Energy-storing compoundMade up of an adenosine compound with 3 phosphate groups attachedWhen the bond that holds the last phosphate group is broken the energy is releasedThe new compound is now called adenosine diphosphate (ADP)

2AutotrophsOrganisms that make their own foodAlso known as producers because they produce food for other organismsEx: plants, bacteria3HeterotrophsOrganisms that cannot make their own foodAlso known as consumers because they consume autotrophs and other heterotrophsEx: humans, fungi4PigmentsMolecules that absorb certain wavelengths of light while reflecting othersChlorophyll: a pigment in plants that absorbs red, blue, and violet light while reflecting green light5ChloroplastStructures in plant cells that contain chlorophyllPhotosynthesis occurs in these structuresMade up of 3 parts:Thylakoid: contains the photosystemsGrana: stacks of thylakoidsStroma: gel-like material between the grana

6PhotosynthesisThe process by which autotrophs convert sunlight into energyThe photosynthetic reaction is: sunlight

6H2O + 6CO2 C6H12O6 + 6O27PhotosystemsPhotosystem II: Uses the light energy from the sun to break water apart into hydrogen, oxygen and electrons; the electrons enter an electron transport chainPhotosystem I: picks up the electrons from the electron transport chain and uses them and the hydrogen to make ATP and NADPH (an energy carrier)These reactions are called the light-dependent reactions because they require sunlight and they take place in the thylakoid

8Calvin CycleA set of reactions that uses the energy in ATP and NADPH (made in the photosystems) to convert carbon dioxide into glucoseThese reactions are called the light-independent reactions because they do not require sunlight and they take place in the stroma


10GlucoseThe glucose made during photosynthesis is used by the plant to provide energy for cellular functionsExcess glucose is linked together to form starch which can then be stored by the plant11


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