0
aspartate (transamination) , malate (dehydrogenation) and pyruvate (carboxylation) .
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What is acetic acid NaOAc?
Sodium oxaloacetate
How many carbon atoms are present in oxaloacetic acid?
Oxaloacetic acid is C4H4O5 and has four carbons
What molecules initiate the citric acid cycle by reacting with oxaloacetate?
Oxaloacetate [oxaloacetic acid], under the strict guidance of the enzyme 'citrate synthase', is reacted with the co-enzyme 'Acetyl-CoA' to form the products CoA and citric acid.
What are the intermediates in the citric acid cycle?
There are 4: oxaloacetate, malate, fumarate, and succinate.
Why can't fatty acids be converted directly to glucose?
Oh my god, this has confused me for months and I finally think I get it, so I hope I can explain it decently. When fatty acids are oxidized, the acetyl-CoA can enter the Krebs cycle, and one would think that the oxaloacetate generated by the Krebs cycle could be converted to acetyl-CoA, which could then be converted to pyruvate for gluconeogenesis. This can't happen, though, because even though oxaloacetate is made, there is no net increase in oxaloacetate (two carbons are lost in the Krebs cycle for every two in the acetyl-CoA coming in). Oxaloacetate can't be taken out of the cycle, then, because then the cycle would be depleted and the only way to replenish it is through one of the anapleoritic reactions, which involve products of glycolysis (PEP and pyruvate). If there is enough PEP or pyruvate around to replenish the oxaloacetate you're taking out to make glucose, chances are you don't need to make glucose in the first place. Pyruvate from glucose or amino acids can be used to make sugars before it is converted to acetyl-CoA, but the pyruvate dehydrogenase complex reaction is irreversible, so once pyruvate is made into acetyl-CoA it cannot be used to make glucose; it is committed to either fatty acid synthesis or the Krebs cycle. Plants can make glucose from fatty acids, but this is only because they are able to use the glyoxlyate cycle instead of the Krebs cycle. The glyoxylate cycle bypasses the step in the Krebs cycle (the alpha-ketoglutarate dehydrogenase step) in which the two carbons are lost as CO2, so when plant acetyl-CoA enters the glyoxylate cycle there IS a net increase in oxaloacetate which can be used to make pyruvate.
What four carbon compounds are regenerated at the end of the Krebs cycle?
Oxaloacetate
The "regenerator" of the Krebs Cycle is?
Oxaloacetate
What is acetic acid NaOAc?
Sodium oxaloacetate
What is oxaloacetat?
Oxaloacetate is an intermedier in the Krebs cycle
What products are generated from TCA cycle?
Oxaloacetate
How many carbon atoms are present in oxaloacetic acid?
Oxaloacetic acid is C4H4O5 and has four carbons
In the C4 pathway the first stable intermediate is?
oxaloacetate.
What molecule does Krebs Cycle begin with?
Acetyle Co-A + Oxaloacetate
Which of the following are true about oxaloacetate?
It is an intermediary in the synthesis of glucose from lactate
Which of the following compounds is regenerated in the citric acid cycle?
Oxaloacetate
Can fatty acids be converted to oxaloacetate?
Not directly. Fatty acid β-oxidation results in acetyl CoA, which is then entered to the Citric Acid cycle. The "last" step of the cycle is the formation of oxaloacetate from malate.
An immediate consequence of a cellular deficiency of oxaloacetate is a slowing of?
The TCA cycle
