chapter 9 (continued) fermentation. glucose 2 atp 2 nadh 2 pyruvate 2 atp 8 nadh 2fadh 2 o 2 32-34...
TRANSCRIPT
![Page 1: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/1.jpg)
Chapter 9 (continued)
Fermentation
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glucose
2 ATP
2 NADH
2 pyruvate
2 ATP
8 NADH
2FADH2
O2 32-34 ATP
water
glycolysis
citric Acidcycle
oxidative phosphorylation
![Page 3: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/3.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
2 ATP
8 NADH
2FADH2
O2 32-34 ATP
water
glycolysis
citric Acidcycle
oxidative phosphorylation
What if there’s no oxygen?
![Page 4: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/4.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
2 ATP
8 NADH
2FADH2
O2 32-34 ATP
water
glycolysis
citric Acidcycle
oxidative phosphorylation
Then there’s nowhere for the ETC to dump its electrons.
![Page 5: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/5.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
2 ATP
8 NADH
2FADH2
O2 32-34 ATP
water
glycolysis
citric Acidcycle
oxidative phosphorylation
So there’s nowhere for NADH
and FADH2 to unload.
![Page 6: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/6.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
2 ATP
8 NADH
2FADH2
O2 32-34 ATP
water
glycolysis
citric Acidcycle
oxidative phosphorylation
So the citric acid
cycle stops.
![Page 7: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/7.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
glycolysis
But wait! It gets even
worse!
![Page 8: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/8.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
You can’t make NADH
without a steady supply
of NAD+.
![Page 9: Chapter 9 (continued) Fermentation. glucose 2 ATP 2 NADH 2 pyruvate 2 ATP 8 NADH 2FADH 2 O 2 32-34 ATP water glycolysis citric Acid cycle oxidative phosphorylation](https://reader035.vdocuments.net/reader035/viewer/2022062313/56649ce55503460f949b32c2/html5/thumbnails/9.jpg)
glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
NADH has nowhere to
dump its electrons.
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
So we stop making more.
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
So even glycolysis
stops.
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
Is there no hope?
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
There is!There’s
something else we can do.
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
We can use the NADH…
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
2 ethanol or 2 lactateWe can use the NADH… to turn
pyruvateinto ethanol or
lactate.
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+
glycolysis
2 ethanol or 2 lactate
That way, at least we get to keep the 2 ATP.
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glucose
2 ATP
2 NADH
2 pyruvate
2 NAD+ 2 ATP
8 NADH
2FADH2
O2 32-34 ATP
water
glycolysis
citric acidcycle
oxidative phosphorylationIt’s not much, but it’s
better than nothing.
2 ethanol or 2 lactate
.