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Glycolysis
Turn out that it is not present (OXYGEN in fossil fuels).
Fermentation normally occurs in an the absence of oxygen (called anaerobic) but is can occur in its presence
Oxygen is present because you can breath it, and it is all around us, but you can not see it. So in some cases it isn't present, but in most it is present.
4 oxygen atoms are present
Glycolysis
No .
oxygen
Cellular respiration is a process that releases chemical energy from sugars and other carbon based molecules to make ATP when oxygen is present. It takes place in the mitochondria. :) -Biology Textbook
when oxygen is not present
It is false that if oxygen is present in a cell, pyruvic acid in glycolysis enters the chloroplasts. The pyruvic acid enters the mitochondria if oxygen is present in a cell.
oxygen needed for cellular respiration
If oxygen is not present in the cell, it automatically goes into a process called fermentation. This produces chemical energy with no oxygen needed.
anaerobic respiration
Aerobic respiration
They die out.
oxygen