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Because NAD+ level will decrease if oxygen is not present to regenerate NADH to NAD + Because NAD+ level will decrease if oxygen is not present to regenerate NADH to NAD +
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∙ 15y ago
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What happens to pyruvate under anaerobic and aerobic conditions?
In humans, under ANAEROBIC conditions (no O2), pyruvate is 'converted' to lactate, though I wouldn't say it is "broken down".In humans, under AEROBIC conditions (O2 present), pyruvate is converted to Acetyl-CoA, via the pyruvate dehydrogenase reaction.In yeast, pyruvate is converted into ethanol (Party Fluid) via pyruvate decarboxylase and then alcohol dehydrogenase.
Can a human survive from only using anaerobic respiration?
Because, the link reaction and the Krebs cycle in respiration can only occur when there is oxygen present. When there is no oxygen available (i.e under anaerobic conditions), the electron transfer chain (etc) can not pass on its electron (as oxygen is the final electron acceptor in the etc). So, the electrons build up in the etc, therefore, electrons from the hydrogen from reduced NAD can no longer be accepted by the cytochromes in the etc. Because of this, no reduced NAD can be converted into oxidised NAD, and hence there is nothing to accept the hydrogens produced in the link reaction and Krebs cycle. Hence the etc and Krebs cycle grind to a halt. Glycloysis, however, can still occur in anaerobic conditions. However, as there is no NAD to accept the hydrogens produced in glycolysis ( due to the blocked etc), the pyruvate formed in glycolysis acts as a hydrogen acceptor. This forms lactic acid, which builds up in the the muscle tissue (and gives you 'stitch') Anaerobic respiration produces a fraction of the ATP that wound be synthesised in aerobic conditions (about 10% i think)
What is the recycling of NAD under anaerobic conditions?
fermentation
What is the recycling of NAD plus under anaerobic conditions?
Fermintation
Does fermentation allows energy to be removed from molecules?
Under anaerobic conditions
When does plant matter accumulate to form coal or oil?
When it is under anaerobic conditions.
Fermentation enables glycolysis to continue under what conditions?
Fermentation allows glycolysis to continue under anaerobic conditions (i.e. in the lack of oxygen)
Does the recycling of ATP ensure the continuation of glycolysis under anaerobic conditions?
NAD+2
Does covering food retard bacterial growth?
No, bacteria can thrive under anaerobic conditions.
True or false Fermentation may occur in a muscle under anaerobic conditions?
false
What does anaerobic methanogens produce?
Under Anaerobic conditions methanogens will utilise the end products of Acetogenesis Carbondioxide and hydrogen and produce methane and water molecules...
Does the Krebs cycle occur if glycolysis occurs?
Yes, it occurs during cellular respiration.
