Question

explain the ways in which glucose is broke down in absence of oxygen.

Answer 1

The way in which glucose is broken down in the absence of oxygen is called anaerobic process.
If oxygen is not present, then ATP production is restricted to anaerobic respiration. The location where glycolysis, aerobic or anaerobic, occurs is in the cytosol of the cell. In glycolysis, a six-carbon glucose molecule is split into two three-carbon molecules called pyruvate.