Oxygen is necessary for complete oxidation of glucose
Answers
The process of glycolysis refers to breaking down of glucose into two molecules of pyruvic acid.
Reasons:
Absence of Oxygen: The fermentation of lactic acid will occur when there is no oxygen. The pyruvic acid is then converted into lactic acid. The pyruvic acid is also broken down into alcohol without the presence of oxygen.
Presence of Oxygen: During the Kerb’s cycle, acetyl CoA is formed from pyruvic acid when oxygen is present and is responsible for the complete oxidation of glucose.
Hence, oxygen is required for the complete oxidation of glucose.
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Answer:
Glucose can be used by two pathways i.e. aerobic and anaerobic respiration. Glucose is completely oxidised only in the presence of oxygen and results in the release of energy. It undergoes three steps to finally reach its fate - glycolysis, Kreb's cycle and electron transport chain reaction. In anaerobic respiration, glucose undergoes partial oxidation and results in the release of energy which is comparitvely less to the energy released during aerobic respiration.