00:01
Which of these statements is true of fermentation? net gain of atp, net gain of nadh, it's aerobic, can only be found in bacteria, or it produces more energy than aerobic respiration per glucose.
00:15
Let's go through these.
00:16
Let's start with d.
00:18
It's not just something for bacteria.
00:20
We do it as well.
00:21
So the plants, fungi.
00:23
It's not aerobic, it's anaerobic.
00:26
So it's performed in the absence of oxygen, and we do it as well.
00:35
We ferment to produce lactate.
00:39
Plants and fungi, they ferment to produce alcohol.
00:45
So it rules those out.
00:46
What's about e? it does not produce more energy than aerobic respiration.
00:51
So if we compare the two processes in humans, so we have glycolysis.
00:57
In aerobic, we also have the krebs cycle, citric acid cycle, and the electron transport chain.
01:05
So we perform glycolysis, the evil one, and then if we don't have oxygen in the cell, we can't do these.
01:11
And that's because oxygen is the acceptor of an electron in the electron transport chain.
01:18
So you pass an electron along the chain, and the terminal acceptor is oxygen.
01:23
If you don't have oxygen, you can't run this chain.
01:25
So you stop after glycolysis and you're left with pyruvate and you have to get rid of the pyruvate in order to keep doing glycolysis.
01:34
Why? well, it's because glycolysis produces an adhd.
01:41
So we're down to the last two answers here...