anaerobic respiration

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Last updated 4:30 PM on 6/10/26
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6 Terms

1
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what is a respiratory substrate?

molecule broken down in respiration to release energy for ATP production

2
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why are lipids good respiratory substrate?

  • lots of H atoms

  • release lots of energy

  • produce lots of reduced NAD and FAD

3
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<p>what happens during lactate fermentation</p>

what happens during lactate fermentation

  1. regular glycolysis:

  • glucose → pyruvate

  • produces 2 ATP

  • NADH is produced

  1. pyruvate → lactate (reversible)

  • lactate transported to liver: requires oxygen to be converted back into pyruvate

  1. lactate continuously oxidises NADH back into NAD

  • allows NAD regeneration

  • so glycolysis cycle continuous

  1. so ATP produced

4
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what causes muscle fatigue

  • lactic acid = low ph

  • so respiratory enzymes less effective

5
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<p>what happens during alcoholic fermentation</p>

what happens during alcoholic fermentation

  1. regular glycolysis:

  • glucose → pyruvate

  • produces 2 ATP

  • NADH is produced

  1. pyruvate → ethanal

  • pyruvate is decarboxylated (remove co2)

  1. ethanal → ethanol

  • ethanol oxidises NADH into NAD

  1. regeneration of NAD allows continuous glycolysis

  • more ATP produced

6
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why does anaerobic respiration produce less ATP per molecule of glucose compared to aerobic.

  • only glycolysis involved (2 ATP)

  • no oxidative phosphorylation (most ATP)