Electron Transport System BIO !!! Lecture 25

Most of the electron carriers of the chain are grouped into four protein complexes what are they?

Complex (I, II, III, and IV)

Electrons enter the chain from two sources what are they?

Electrons from NADH + H+ accepted by Complex I and/or Electrons from FADH2 accepted by Complex II

Proton pumping creates an _________ between the inner membrane space and the matrix.

imbalance

Because of an imbalance, protons return to the matrix by passing through ______________ in the inner membrane.

ATP synthase

The chemiosmotic mechanism of ATP production accounts for ____ of the 36 (net yield) ATP per glucose.

32

What serves as the terminal electron acceptor?

Oxygen

What is ATP synthase powered by?

hydrogen ions (H+)

Where does ATP synthase occur?

Inner mitochondrial membrane in eukaryotic cells

Hydrogen ions enter binding sites within a _________, changing the shape of each subunit so that it spins within the cell membrane.

rotor

Each hydrogen ion makes _________________ before leaving the rotor and passing through a second half channel in the stator into the mitochondrial matrix.

one complete turn

Spinning of the rotor causes an _______________ to spin.

internal rod

The internal rod extends like a stalk into the ___________________ below it, which is held stationary by part of the stator.

catalytic knob

Turning of the rod activates the catalytic sites in the knob that produce ATP from ________ and ________.

ADP and Pi