Citric Acid Cycle Flashcards
(13 cards)
What are two alternative names for the citric acid cycle?
- Tricarboxylic acid cycle
- Krebs cycle
Where does the citric acid cycle occur?
In the mitochondria
What are the four main products of the citric acid cycle?
- 2 CO2
- 3 NADH
- 1 FADH2
- 1 ATP
What four molecule can serve as substrates for the citric acid cycle?
- Carbohydrates
- Lipids
- Proteins
- Volatile fatty acids
How do sugars and fatty acids enter the citric acid cycle?
They are converted into acetyl-CoA
How are amino acids utilised in the citric acid cycle?
They can be deaminated and their carbon skeletons feed into the cycle
What happens to pyruvate before it enters the citric acid cycle?
Is converted to acteyl-CoA by the pyruvate dehydrogenase complex
What are the products of pyruvate conversion to acteyl-CoA?
- NADH
- CO2
- Acetyl-CoA
Where does the oxygen used to form CO2 in the citric acid cycle come from?
From intermediate molecules
What regulates the entry of pyruvate into the citric acid cycle?
Pyruvate dehydrogenase
What activates pyruvate dehydrogenase
- ADP
- Pyruvate
What inhibits pyruvate dehydrogenase?
- ATP
- NADH
- Acetyl-CoA
What is the citrate transport system used for?
It transports citrate from the mitochondria to the cytoplasm for fatty acid synthesis
