Krebs Cycle, Electron Chain, Oxidative Phosphorylation & Chemiosmosis Flashcards
From one Glucose molecule, how many Krebs cycles take place?
Two. One from each split sugar (pryuvic acid) in the Glycolsis reaction.
What happens to the Acetyl-CoA as it comes into the cycle?
The Coenzymes leaves the 2 carbon Acetate allowing it to bond with the 4 carbon Oxaloacetate making a 6 carbon compound called Citrate. The coenzyme has gone back to be recycled again.
What happens to the 6 carbon Citric Acid to make it loose a carbon?
It looses a carbon through expelling carbon dioxide.
What molecules go into and out of one cycle of the Krebs cycle?
Into Krebs:
- 1 Acetyl-CoA
- 3 NAD
- 1 FAD
- 1 ADP & Pi
Out of Krebs
- 2 CO2
- 3 NADH+ H+
- 1 FADH2
- 1 ATP
What is the purpose of the 12 hydrogen electrons gathered up from the Glycolsis, Link reaction and Krebs cycle?
10 From HAD and 2 from FAD
They are going to be used to produce energy making ATP.
What is the next cycle after Krebs?
Oxidative Phosphorylation
Up to the point of the elctron chain what molecules have we made from one molecule of Glucose?
- 6 CO2
- 4 ATP
- 10 NADH + H+
- 2 FADH2
What is Chemiosmosis?
This is the over arching name given to the forming of ATP and the movement of the hydrogen ions and protons through there electro gradient of the membrane.
At the end of the electron transport chain and ATP synthase is bonding ADP & Pi molecules together using the hydrogen atoms. Water is also formed.
What is Oxidative Phosphorylation?
The adding of a phosphate groups to another molecule using oxidation. Done when making ATP.
What are the two steps in Oxidative Phosphylation?
- Electron Transport Chain
- Chemiosmosis
Where is the electron chain located?
Inner mitochondrial membrane
Talk through what happens to the hydrogens and electrons in the electron chain?
The Hydrogen/electron carriers HAD & FAD come to the inner membrane and deposit there hydrogens and electrons. The hydrogen leave the matrix via protein complexs.
The electrons have a high energy state and travel through the matrix inner membrane until they have a lower energy state and come back into the matrix forming water with the oxygen.
The hydrogen are now in high concentraion in the intermembrane space and come back through the membrane into the matrix through ATP Synthase forming ATP.
How many ATPs are made per Glucose molecule?
38 ATP
How many ATPs are made from 1 HADH?
3 ATP
For every FADH2 how many ATPs are made?
2 on average.
