[16] Citric Acid Cycle Flashcards
What is the Citric Acid Cycle?
A series of chemical reactions used by all aerobic organisms to release stored energy.
Where does the Citric Acid Cycle occur in the cell?
In the mitochondrial matrix.
What is the starting molecule for the Citric Acid Cycle?
Acetyl-CoA.
How many molecules of carbon dioxide are produced per turn of the Citric Acid Cycle?
Two CO2 molecules.
What is the end product of the Citric Acid Cycle?
Oxaloacetate.
How many ATP molecules are produced in the Citric Acid Cycle?
One ATP (or GTP).
What are the main products of the Citric Acid Cycle?
- ATP/GTP
- NADH
- FADH2
- CO2
What is the significance of NADH and FADH2 produced in the Citric Acid Cycle?
They are used in the Electron Transport Chain to produce ATP.
How many NADH are produced per cycle?
Three NADH.
How many FADH2 are produced per cycle?
One FADH2.
How many cycles does one glucose molecule go through?
Two cycles (as glucose is split into two pyruvate molecules during glycolysis).
What are the main regulatory enzymes in the Citric Acid Cycle?
- Citrate synthase
- Isocitrate dehydrogenase
- Alpha-ketoglutarate dehydrogenase
What is the role of Coenzyme A in the Citric Acid Cycle?
It transports the acetyl group to the cycle.
What is the role of oxaloacetate in the Citric Acid Cycle?
It combines with acetyl-CoA to form citrate, starting the cycle.
What molecule does citrate synthase produce?
Citrate.
