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Light Reaction:
Describe how fluorescence spectroscopy can be used to understand photosynthetic electron transport. ... Chlorophyll is used because it provides a suitable essential probe of the light-harvesting apparatus and allows measurement of photosynthetic electron transport. ... He used low temperature (77K) fluorescence spectroscopy to measure the distribution of absorbed light energy between the light gathering antenna complexes and photosystems I and II. ... In his results, he observed that the spectra indicated that in a dark-apated state that the antenna energy distribution between the two types of reaction centers was significantly different for the two types of cells. The mixotrophic cells were in a state where most of the antenna energy was transferred to photosystem I, and after light treatment the ratio of photosystem II to photosystem I fluorescence notably increased and resembled closely the spectra seen in the photosynthetically grown cells. ...
Dark Reaction:
Is there a biological function for photorespiration? ... This is due to the fact that photorespiration only happens because it operates in the light and involves the uptake of O2 and the release of CO2.
Approximate Word count = 762
Approximate Pages = 3
(250 words per page double spaced)
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