Chapter 8 Photosynthesis.

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Presentation transcript:

Chapter 8 Photosynthesis

8.1 Energy and Life Energy needed to: - grow, develop - move materials around - build new molecules - respond to environmental changes

Energy from ATP ATP = Adenosine TriPhosphate

Energy is stored in the bond holding the last phosphate When last bond is broken, energy is released and ADP + P is formed ATP  ADP + P + energy

Heterotrophs and Autotrophs Organisms get energy by: - consuming other living things ( = heterotrophs) - making their own food ( = autotrophs)

8.2 - Photosynthesis Photosynthesis = process by which plants, some algae, some bacteria capture sun’s energy and convert it to useable chemical energy. 6CO2 + 6H2O  C6H12O6 + 6O2 Occurs in chloroplast

Pigments absorb light energy - main pigment = chlorophyll Occurs in 2 stages: - Light-dependent reactions - Light-independent reactions (aka Calvin cycle)