Suppose a cell does not have oxygen available. Maybe the cell happens to be on the moon, or maybe the cell's owner is sprinting away from a lion and is using up all the oxygen at the moment. Rule #1 of aerobic cellular respiration– stay away from lions.

The cell can do glycolysis as usual, but can't run the Kreb’s cycle or electron transport chain since oxygen isn't around to accept extra electrons.

If the cell is on the moon or in the deep ocean, or some other environment without a lot of oxygen, what do you think will happen to it?

A. It dies.
B. It goes dormant.
C. It runs glycolysis only.