mcb450-18s07

mcb450-18s07 - Lecture 18 Photosynthesis Overall Process of...

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Lecture 18 Photosynthesis
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Overall Process of Respiration C 6 H 12 O 6 + 6 O 2 = 6 CO 2 + 6 H 2 0 Each atom of oxygen consumed re- oxidizes an FADH 2 or a NADH + H + There are two FAD-requiring steps and there are two GTP generating steps in the complete combustion of glucose, so it is as if each atom of oxygen re-oxidized NADH + H + . The estimated ATP yield is 2.5 x 12 = 30.
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Overall Process of Photosynthesis • 6 CO 2 + 6 H 2 0 C 6 H 12 O 6 + 6 O 2 As the above equation states, photosynthesis can be regarded formally as the reverse of respiration. The overall equation above belies the complexity of photosynthesis. (light)
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Anatomy of a Chloroplast
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Light and Dark Reactions Light reactions – Occur only in the presence of light; evolve oxygen; produce NADPH + H + ; synthesize ATP Dark reactions – Do not require light. Can occur in the presence or absence of light. Comprise pathway of carbon in the synthesis of glucose.
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Location of Light & Dark Reactions
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Chlorophyll Structure Chlorophyll contains a protoporphyrin ring system akin to that of Hb, but Mg 2+ is the metal ion at the center.
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Chlorophyll Absorption Spectra
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Action Spectrum of PS
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Action Spectrum of PS The action spectrum of photosynthesis corresponds to the absorption spectra of chl a and chl b.
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mcb450-18s07 - Lecture 18 Photosynthesis Overall Process of...

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