Continue to draw citric acid cycle intermediates up until a 14C-labeled CO2 molecule is generated by the cycle. How many turns of the citric acid cycle must be made before 14CO2 is released? Which enzymatic reaction in the citric acid cycle first catalyzes the release of 14CO2?
The 14C-labled CO2 molecule is from the orginal Carbon #2 carbon on the frutose molecule.
This is the one turn of the cycle.
In the one turn 2 CO2 molecules releases.
For the 14 CO2 molecules it needs 7 turns.
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