The preparation reaction, the citric acid cycle, and the electron transport chain take place within the mitochondria.
There is an intermembrane space between the outer and inner membrane of A.
The organelle of a mitochondrion is highly structured, so we would expect reactions to be located there.
Achondrion has an intermembrane space between the outer and inner membranes.
The shelflike cristae is formed by the inner membrane invaginating.
The cristae is where the electron transport chain is located, and the matrix is where the prep reaction and citric acid cycle are preformed.
The powerhouses of the cell are the mitochondria, which produce most of the ATP from cellular respiration.
It converts products from glycolysis into products that enter the citric acid cycle.
The C3 pyruvate is converted to a C2 acetyl group and CO2 is given off.
The oxidation reaction in which pyruvate is removed by NAD+ and NADH is called an oxidation reaction.
A molecule known as CoA is combined with the C2 acetyl group.
The electron transport chain is carried by the two NADH.
CO2 can be diffused out of cells into the blood, which can be taken to the lungs, where it can be exhaled.
The Krebs cycle is a pathway located in the matrix of mitochondria.
The (C2) acetyl group carried by CoA is joined with a C4 molecule and a C6 citrate molecule at the beginning of the citric acid cycle.
When electrons are accepted by FAD in one instance, oxidation occurs.
Three NADH and one FADH2 are formed as a result of one turn of the citric acid cycle.
The acetyl group received from the prep reaction is converted to CO2 molecule.
The citric acid cycle has an important event called Substrate-level ATP synthesis.
You will recall that in ATP synthesis, a high-energy phosphate is passed to the ADP and the results are obtained.
The complete reduction of the glucose molecule is caused by the citric acid cycle in the mitochondria.
The cycle of the acid turns twice per molecule.
There are six carbon atoms in a molecule.
The first two CO2 are produced by the prep reaction and the last four are produced by the citric acid cycle.
We have broken down the sugars to the CO2 and hydrogen atoms.
When bonds are broken, energy in the form of high-energy electrons is released.
The high-energy electrons are captured by NADH and FADH2 and transported to the electron transport chain.
The electron transport chain is located in the cristae of the mitochondria and is a series of carriers that pass electrons from one to the other.
NADH and FADH2 carry the high-energy electrons that enter the electron transport chain.
The electrons are taken to the electron transport chain.
Energy is used to pump hydrogen ion from the matrix into the intermembrane space.
As hydrogen ion flow down a concentration gradient from the intermembrane space into the mitochondrial matrix, the molecule is synthesised.
Oxygen becomes part of water.
The matrix is left by way of a channel.
When FADH2 gives up its electrons, it becomes oxidized to FAD.
The electrons are gained by the next carrier.
As the electrons move down the chain, each of the carriers becomes reduced and then oxidizes.
Many of the carriers are cytochromes.
The same as hemoglobin, a cytochrome has a tightly bound heme group with a central atom of iron.
When the iron accepts electrons, it reduces, and when it gives them up, it oxidizes.
The energy is captured when the electrons are passed from carrier to carrier.
A number of poisons cause death by binding to and blocking the function of cytochromes.
Oxygen is a part of the electron transport chain.
Oxygen gets the electrons from the last carriers.
Oxygen is the final acceptor of electrons during cellular respiration and it is important that oxygen is present.
When NADH delivers high-energy electrons to the first carrier of the electron transport chain, enough energy has been captured by the time the electrons are received by O2 to allow the production of three ATP molecules.
Two ATP are produced when FADH2 delivers high-energy electrons to the electron transport chain.
When NADH has delivered electrons to the electron transport chain, it is able to return and pick up more hydrogen atoms.
The reuse of coenzymes increases cellular efficiency because the cell doesn't have to make new NAD+ constantly.