The TCA [Citric Acid / Krebs] Cycle [short]

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The Citric Acid Cycle
Acetyl-CoA enters the citric acid cycle where it is oxidized to CO2. Remember that the Citric Acid cycle is a loop that requires entry of acetyl-CoA to keep going.
Oxaloacetate combines with acetyl to produce citrate, releasing CoA.
Each round of the citric acid cycle produces: 3 NADH, 1 FADH2, and 1 GTP.
All reactions are catalyzed in the mitochondrial matrix, each by a different enzyme.
The products of the cycle are high energy molecules that can now participate in the electron transport chain to produce lots of ATP.



Balance After Glycolysis + Pyruvate Processing + Citric Acid Cycle
Glycolysis: 2 pyruvate, 2 ATP, 2 NADH
Pyruvate processing: 2 acetyl-CoA, 2 NADH
Citric acid cycle: 6 NADH, 2 FADH2, 2 GTP

NET REACTION: 4 ATP, 10 NADH, 2 FADH2

Practice: Products of TCA/Citric Acid/Krebs Cycle
What is generated through one turn of the citric acid cycle?

A)ATP,CO2,NADH,FADH2ATP,CO_2,NADH,FADH_2ATP,CO2​,NADH,FADH2​

B) ATP,CO2,NAD+,FADH2ATP,CO_2,NAD^+,FADH_2ATP,CO2​,NAD+,FADH2​

C)2pyruvate,2ADP+Pi,2NADH;and  4ATP2pyruvate,2ADP+P_i,2NADH;and\;4ATP2pyruvate,2ADP+Pi​,2NADH;and4ATP

D) 2pyruvate,2ADP+Pi,2NADH  and  2ATP2pyruvate,2ADP+P_i,2NADH\;and\;2ATP2pyruvate,2ADP+Pi​,2NADHand2ATP

E) 30 or 32ATP30\,or\,32ATP30or32ATP

I don't know

Practice: CO2 Released by Krebs Cycle
How many CO2CO_2CO2​  molecules are released per acetyl group that passes through the Krebs cycle?	

Wize AP Biology Textbook > Cellular Respiration

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