Previously, you've learned about the first two phases
of cell respiration with glycolysis and pyruvate oxidation.
Now it's time to dig in a little deeper and look at the
Krebs cycle and Electron Transport Chain that's paired
with chemiosmosis. This is where the real energy yields
happen. So in this lecture, we will continue our tracking of
carbon as well as electron carriers and ATP production.
So by the end of it you should be able to diagram
where each of these come from in the whole process of
cellular respiration as well as where they go.
For example, electron carriers end up going to the
Electron Transport Chain. Also you should be
able to describe how the electron or the gradient is
created during the Electron Transport Chain.
And explain how ATP is produced in the
process of chemiosmosis.
Previously we covered glycolysis and pyruvate oxidation.
Now it's time to move into the Krebs cycle
and Electron Transport Chain. We've already produced some
full electron carriers with their hydrogens and
electrons. And now in the Krebs cycle, we are
going to produce even more electron carriers.
We have NAD's picking up hydrogens and
electrons to become NADH, plus an extra H.
And then we have a new player which is FADH which
will actually become FADH2. So FAD to FADH2.
Another electron carrier works in just the same way
as NAD. So, don't get in a panic about it.
The point here is they will transport electrons to the
Electron Transport Chain and that is where
we'll see generation of piles and piles of ATP. The major
energy yielding phase of cellular respiration.