BIOL 4160 Midterm: BIOL 4160 Exams_2011
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Key term test one (17 october 2011)_ page 1 of 5. Photosynthesis (sc/biol 4061) first term test (17 oct 2011) Answer four of the following five questions in the exam booklet provided. There is both direct and indirect evidence for primordial" photosynthesis. Isotopic carbon discrimination is one example of evidence. Explain why it is used (and its interpretation). Three thousand million years after the advent of oxygenic photosynthesis, earth is clearly out of equilibrium: dangerously high levels of oxygen (o2) in the atmosphere and barely sufficient levels of carbon dioxide (co2). Shown is global fluorescence due to photosynthesis during july and december. Explain why global fluorescence could be used to evaluate photosynthetic activity and how it relates to photosynthetic productivity. (nota bene question five overleaf) page 2 of 5. Excitation (narrow lines) and emission (thick lines) spectra are shown for three common fluorochromes.
