Fermentation
FERMENTATION · IMAT Doutor1 / 1
Facultative anaerobes such as yeast switch to fermentation when oxygen runs out, whereas an obligate aerobe dies. The reason is that the obligate aerobe:
A
Is poisoned by the pyruvate it produces, which accumulates without oxygen
B
Loses its mitochondria in the absence of oxygen and cannot rebuild them in time
C
Cannot take up glucose without oxygen, because its transporters need ATP from respiration
D
Has no way to regenerate NAD⁺ without the respiratory chain, so glycolysis also stops
E
Cannot perform glycolysis at all, since it obtains all its ATP from fatty acids
Keyboard: A–E to choose, Shift + letter to cross out, Enter to confirm.