Physical Biochemistry. Bio 3374 Problem Set I. Spring 2011. Problem set is due on Thursday, April 14, 2011 no later than 5 PM (Room 442). Please stop by Room 442 BLS if you have any questions. Please show all work for every question. 1. Some photosynthetic bacteria are able to harvest 900-nanometer light (4 points). A. What is the energy in kilocalories of a mole (an einstein) of 900-nanometer light? B. What is the minimum number of 900 nanometer photons needed to form one molecule of ATP from ADP and inorganic phosphate? Assume a ∆G of 12 kilocalories per mole for the photo-phosphorylation reaction in bacteria. Hint: The question asks for the number of photons out of a mole of photons. Please show all calculations. 2. Describe the importance of the red drop/Emerson enhancement effect on the development of a workable model for photosynthetic electron transport in higher plants. 3. In the light reaction of photosynthesis, the capture of light energy results in the release and subsequent transfer of electrons. From what molecules are the electrons originally derived?
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