Why does the electron transport chain need NADH?

NADH and FADH2 made in the citric acid cycle (in the mitochondrial matrix) deposit their electrons into the electron transport chain at complexes I and II, respectively. This step regenerates NAD+ and FAD (the oxidized carriers) for use in the citric acid cycle.

Why do we need the electron transport chain?

The electron transport chain is primarily used to send protons across the membrane into the intermembrane space. This create a proton-motive force, which will drive ATP synthase in the final step of cellular respiration to create ATP from ADP and a phosphate group.

Why are electrons transferred from NADH H+ to oxygen?

Electrons are transferred from NADH/H+ to the molecular oxygen in a forward direction in the electron transport system, and the energy liberated during the movement of electrons is utilized to create an electrochemical gradient. The energy stored in the gradient is employed to develop ATP in chemiosmosis.

Why is the electron transport chain important in cellular respiration?

The electron transport chain is the last stage of the respiration pathway. It is the stage that produces the most ATP molecules. The electron transport chain is a collection of carrier proteins found on the inner membrane of mitochondria. This provides alternative metabolic pathways to make ATP.

What is the function of the electrons carried to the electron transport chain by NADH and FADH2?

The electrons carried to the chain by NADH and FADH2 provide the energy that pumps protons across the inner membrane of a mitochondrion.

When NADH donates electrons to the electron transport chain?

NADH is the electron donor in this system. It initiates the electron transport chain by donating electrons to NADH dehydrogenase (blue). NADH donates two electrons to NADH dehydrogenase. At the same time, the complex also pumps two protons from the matrix space of the mitochondria into the intermembrane space.

What is the role of NADH in respiration?

NADH is a crucial coenzyme in making ATP. It exists in two forms in the cell: NAD+ and NADH. The molecule acts as a shuttle for electrons during cellular respiration. At various chemical reactions, the NAD+ picks up an electron from glucose, at which point it becomes NADH.

What is the importance of NADH and FADH2 in cellular respiration?

Cells of all living organisms need NADH and FADH2 (naturally occurring coenzymes) for energy production. During cellular respiration, the cells use these coenzymes to turn fuel from food into energy.

Why are electron transport chain important in the production of ATP?

The electron transport chain is a series of protein complexes and electron carrier molecules within the inner membrane of mitochondria that generate ATP for energy. This movement of protons provides the energy for the production of ATP. The electron transport chain is the third step of aerobic cellular respiration.

In what order do the electrons move through the electron transport chain?

The electrons must travel through special proteins stuck in the thylakoid membrane. They go through the first special protein (the photosystem II protein) and down the electron transport chain. Then they pass through a second special protein (photosystem I protein).