Question: The growth rate of the phototrophic purple bacterium Rhodobacter is
The growth rate of the phototrophic purple bacterium Rhodobacter is about twice as fast when the organism is grown phototrophically in a medium containing malate as the carbon source as when it is grown with CO2 as the carbon source (with H2 as the electron donor). Discuss the reasons why this is true, and list the nutritional class in which we would place Rhodobacter when growing under each of the two different conditions.
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