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Kreb Cycle In/Output

How well do you know the ins and outs of the Kreb Cycle?

QuestionAnswer
For each molecule of pyruvate that enters the Kreb's cycle, how actual carbon atoms enter the cycle? 2 carbon atoms. Pyruvate has 3, but one is lost as CO2.
When acetyl Coenzyme A combines with oxaloacetate, what molecule is produced? Citrate
When citrate is converted to isocitrate, how many NADH are produced? None
When isocitrate is oxidized to become alpha-ketoglutarate, what molecules are released? 1 NADH and 1CO2
When alpha-ketoglutarate is further oxidized to produce Succinyl CoA, what molecules are produced? 1 NADH and 1CO2
Succinyl CoA is converted to Succinate and this releases Coenzyme A. What energy molecule is generated in this reaction? GTP
What electron carrier is reduced when succinate is oxidized to fumerate? FAD is reduced to produce FADH2. If you said "FADH2" then technically this is wrong since the question asks for the molecule that 'will be' reduced.
When fumerate is converted into malate, what molecule is required? H20. This is a hydration reaction.
When malate is oxidized to oxaloacetate, what high energy electron carrier is produced? NADH
If we start with 1 molecule of 6 carbon glucose, how many carbon atoms are able to enter the Kreb's Cycle? 4 carbon atoms
If we start with 1 molecule of glucose, how many molecules a NADH can be produced by the Kreb cycle? 6 NADH. 3 are produced for each acetyl-CoA that enters the cycle, and 1 glucose molecule allows for 2 acetyl-CoA to be generated. If you thought '8' you might have included the NADH produced when pyruvate combines with CoA
Created by: ParentalConflict
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