Friday, November 22, 2013

Fermentation question

Q: When to use fermentation in place of respiration?

A: Should be referring to FACULTATIVE ANAEROBES that can carry out both fermentation and respiration. 
Respiration is used when there is usable electron acceptor present. 
Fermentation is used when there is no usable electron acceptor AND there is fermentable substrate. For example, fermentable sugar is needed for glycolysis.

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