00:01
Okay, which of these could be products of a fermentation pathway? hydrogen gas, glucose, oxygen, lactic acid, or ethanol.
00:11
So first, what is the point of fermentation? well, fermentation happens in anaerobic conditions, so it's when the organism does not have oxygen.
00:20
But it still needs atp, so it performs respiration.
00:24
First step of respiration is glycolosis.
00:27
So glycolysis takes in glucose, or sometimes another, entry product, entry reactants, and it turns into pyruvate, and in doing so, you get a little bit of atp.
00:39
From glucose, you get a net profit of 2 atp per molecule of glucose.
00:44
So you don't just get pyruvate, so you get the 2 atp, and you also get nadh.
00:50
So that's an electron carrier.
00:53
If you were proceeding down aerobic respiration, you would have the krebs cycle, citric acid cycle, and then the electron transport chain, this electron carrier would go into the electron transport chain.
01:05
It would give up its electron.
01:07
But with fermentation, that isn't happening.
01:10
We stop at this point and we have a buildup of these.
01:13
So the atp is fine, that's what we want.
01:16
The pyruvate is something that might be building up, might need to get rid of that.
01:21
Nadh is the big problem, though.
01:23
The point of fermentation pathways is to regenerate nad plus.
01:27
Because right now glycolysis is going to stop because we no longer have empty electron carriers.
01:34
So we need to regenerate nad plus from an adhd...