Question

explain the ways in which glucose is broken down in absence or shortage of oxygen​

Answer 1

In the absence of oxygen When breakdown of glucose is carried out in the absence of oxygen in a cell, it is called as anaerobic respiration. This process is called as fermentation in microbes. Ethyl alcohol or lactic acid is produced by the breakdown of pyruvate.

Answer 2

• first step is always the breakdown of glucose to pyruvate.

• in absence of oxygen this pyruvate is broken down to form ethanol and carbon dioxide and gives out energy.usually takes place in yeast during fermentation
• in shortage of oxygen pyruvate breaks down to form lactic acid and energy.usually happens in muscles during sudden activity.