Bio 1510 - 8 - Bio 1510 Basic Life Mechanisms Bio 1510...

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Unformatted text preview: Bio 1510 Basic Life Mechanisms Bio 1510 Basic Life Mechanisms Fall 2008 Fall 2008 Dr. Rasheeda Zafar Chapter # 8 Photosynthesis Photosynthesis 1 2 Photosynthesis Photosynthesis Energy for all Life on earth ultimately comes Energy for all Life on earth ultimately comes from Photosynthesis from Photosynthesis 2 2 6 12 6 2 2 Photosynthesis Photosynthesis 3 Two types Two types Light dependent reactions Light dependent reactions Capture energy from sunlight Make ATP + Photosynthesis Overview Photosynthesis Overview 4 Takes place in Chloroplasts Chloroplasts Thylakoid Thylakoid membrane Internal membrane arranged in flattened sacs Contain chlorophyll chlorophyll and other pigments Grana Grana Stacks of thylakoid membranes Stroma Stroma Semiliquid substance surrounding thylakoid membranes Photosynthesis Overview Photosynthesis Overview 5 Discovery of Photosynthesis Discovery of Photosynthesis 6 Many scientists have contributed to our understanding of how photosynthesis works Jan Baptista van Helmont (1580-1644) Joseph Priestly (1733-1804) Jan Ingen-Housz (1730-1799) F. F. Blackman (1866-1947) C. B. van Niel, 1930s-proposed a general formula 2 2 2 2 Pigments Pigments 7 Photon Photon A particle of light Acts as a discrete bundle of energy Energy content is inversely proportional to the wavelength of light Photoelectric effect Photoelectric effect Removal of an electron from a molecule by light Occurs when photons transfer energy to electrons Pigments Pigments 8 Molecules that absorb visible light...
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Bio 1510 - 8 - Bio 1510 Basic Life Mechanisms Bio 1510...

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