Since Hydrogen Bacteria have standard cellular structures, and carry out the usual cellular functions, they require carbon-containing compounds to synthesize the various macromolecules commonly found in cells. To obtain the starting material for these compounds, the bacteria use the enzymes of the Calvin-Benson cycle to fix CO 2 from the atmosphere. Consider both the ATP that participates in the fixation reactions directly, and any ATP that is produced or consumed in order to generate the reactants. The O2 concentration in the suspension of mitochondria is plotted on the vertical axis. When needed, a scale is provided.
Time is on the horizontal axis.
The magnitude of the time scale is unimportant, but is on the order of minutes. The relevant properties of these reagents can be found in your text or lecture handouts. Ascorbate is a 2 electron reductant. That is, one mole of ascorbate reduces two moles of cytochrome c . If the amount of a reagent is not specified in the problem, the amount does not matter.