Citric Acid Cycle Flashcards
Where does the citric acid cycle occur?
Matrix of the mitochondria.
Why is the citric acid cycle very efficient?
Does not need many intermediate compounds.
What does the citric acid cycle act as a gateway for?
Any compound that can be converted into acetyl coenzyme A or a component of the cycle to enter aerobic respiration.
How does the citric acid cycle produce ATP?
Not directly, but through the use of electron carriers that then go to the electron transport chain and produce ATP.
What does the citric acid cycle do?
Removes electrons from intermediates and passes them onto NADH and FADH.
Is O2 used in the citric acid cycle?
NO
What does the use of O2allow for glucose?
It to be completely broken down into CO2and all of its energy to be stored.
What substances can be broken down into acetyl coenzyme A and enter the citric acid cycle?
*Glucose
*Fatty acids
*Amino acids
What does the overall metabolism process look like (glycolysis, citric acid cycle and the electron transport chain)?
And electron transport chain gives 30-32 atp*
Why are substances like glucose broken down in lots of little steps and not all at once?
It allows packets of energy to be stored, breaking down the compound at once would release to much enery to be capture so most of it would be lost as heat.
What does acetyl coenzyme A allow?
Many intermediates to enter the citric acid cycle.
What enzyme coverts pyruvate into acetly coenzyme A?
Pyruvate dehydrogenase complex.
How many sub units is pyruvate dehydrogenase complex composed of?
TEN copies of each sub unit(E1+ E2+ E3)
What does each subunit of pyruvate dehdrogenase complex do?
Catalyses a different part of the reaction.
What happens to the concentration of the intermediates within the citric acid cycle?
They remain constant as each turn 2 carbons enter (acetyl coenzyme A) and 2 carbons leave (as 2 CO2).
What does the citric acid cycle look like in terms of the amount of carbon each complex has and the use of electron carriers?
