Kreb cycle Flashcards
What does the Kreb cycle do?
oxidizes the incoming acetyl-CoA
What does the Kreb cycle create
1 ATP, 3 NADH, 1FADH2 and 2 CO2 molecules.
What is the purpose of the Kreb Cycle
To transfer electrons to the “electron storage” molecules, NADH and
FADH2
Another name for Kreb cycle
citric acid cycle
The Kreb’s cycle must function twice for each molecule of glucose.
Why?
because glucose is split into two pyruvate molecules during glycolysis. Each pyruvate is turned into Acetyl-CoA, which enters the cycle, so the cycle must happen twice to fully process one glucose molecule.
What is decarboxylation?
Decarboxylation is the process of removing a carbon atom from a molecule in the form of carbon dioxide (CO₂)
_____ CO₂ molecules are released per turn of the Krebs cycle.
Two
Since the cycle runs TWICE for each glucose molecule, a total of _____ CO₂ molecules are released per glucose molecule.
four
Where do the CO₂ molecules come from?
The CO₂ molecules come from the breakdown of the carbon atoms in the Acetyl-CoA (derived from pyruvate).
How many ATP molecules are produced?
1
Since the Krebs cycle runs twice for each glucose molecule, these numbers double for a total of ___ ATP, __ NADH, __ FADH₂, and __ CO₂ per glucose molecule.
2, 6, 2 and 4
List the final products of Kreb’s and list where each of them head off
to.
1 ATP (or GTP)
Used immediately by the cell for energy.
3 NADH
Heads to the electron transport chain in the mitochondria to help produce more ATP through oxidative phosphorylation.
1 FADH₂
Also goes to the electron transport chain to aid in ATP production.
2 CO₂
Released as waste and exhaled by the organism.
Is Kreb cycle an anaerobic or aerobic process?
aerobic process
