Hello,
I would like to know where the fork in the road for each of the three processes: 1)Aerobic Cell Resp. 2) Anaerobic Cell Resp 3) and Fermentation (which includes both lactic acid and alcohol)
I've been confused by my reading. From my point of view, both Aerobic and Anaerobic cell resp will go from: 1) glycolysis ( using 2 ATP to make 2 three-carbon sugar isomers, and then oxidizing those two, via the reduction of NAD+, and producing 4 ATP, thus net 2 ATP...etc) then...
2) if oxygen is available, the pyruvates made from glycolysis enter the mitochondria (via active transport b/c pyruvate is an ion) and be oxidized to acetyl CoA and go to citric cycle and then to oxidative phosphorylation (which includes the ETC and chemiosis).
3) if oxygen is not available, it will still go through what was mentioned above but Oxygen won't be the final acceptor of electrons, but some other strong electronegative element.
And... Fermentation will just go through glycolysis. I'm confused b/c I thought that anaerobic respiration IS fermentation and thus anaerobic wouldn't go through citric and etc and cheimoisis. Can someone please clarify this for me?
I would like to know where the fork in the road for each of the three processes: 1)Aerobic Cell Resp. 2) Anaerobic Cell Resp 3) and Fermentation (which includes both lactic acid and alcohol)
I've been confused by my reading. From my point of view, both Aerobic and Anaerobic cell resp will go from: 1) glycolysis ( using 2 ATP to make 2 three-carbon sugar isomers, and then oxidizing those two, via the reduction of NAD+, and producing 4 ATP, thus net 2 ATP...etc) then...
2) if oxygen is available, the pyruvates made from glycolysis enter the mitochondria (via active transport b/c pyruvate is an ion) and be oxidized to acetyl CoA and go to citric cycle and then to oxidative phosphorylation (which includes the ETC and chemiosis).
3) if oxygen is not available, it will still go through what was mentioned above but Oxygen won't be the final acceptor of electrons, but some other strong electronegative element.
And... Fermentation will just go through glycolysis. I'm confused b/c I thought that anaerobic respiration IS fermentation and thus anaerobic wouldn't go through citric and etc and cheimoisis. Can someone please clarify this for me?
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Respiration uses an electron transport chain. If oxygen is the final electron acceptor it is aerobic respiration; if something other than oxygen is the final electron acceptor, then it is anaerobic respiration.
Fermentation does not use an electron transport chain, so is not respiration.
So after glycolysis produces pyruvate, the pyruvate can enter either fermentation or respiration pathways. Fermentation can be alcoholic fermentation or lactate fermentation. Respiration can be either aerobic respiration or anaerobic respiration.
Fermentation does not use an electron transport chain, so is not respiration.
So after glycolysis produces pyruvate, the pyruvate can enter either fermentation or respiration pathways. Fermentation can be alcoholic fermentation or lactate fermentation. Respiration can be either aerobic respiration or anaerobic respiration.