Question

Explain the breakdown of glucose by various pathways

Answer 1

Breaking down of glucose can occur by various pathways ;

⑴ In presence of oxygen :
- Breaking down of glucose into pyruvate takes place in Mitochondria of a cell.
- End products are CO₂ , H₂O and energy.

⑵ In insufficient presence of oxygen :
- In muscle cells, due to insufficient presence of oxygen the cells undergoes anaerobic respiration.
- End products are Lactic acid and lot amount of energy.

⑶ In absence of Oxygen :
- In absence of Oxygen, glucose breakdown into pyruvate in cytoplasm only.
- End product are Ethanol, and small amount of energy.
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Answer 2

Answer:

The following are the various ways in which glucose is broken down.

1. Aerobic Respiration
2. Anaerobic Respiration
3. Lack of Oxygen

Explanation:

For all living organisms, glucose is the most significant source of energy. Food is broken down into carbohydrates, the most significant of which is glucose. Glucose is oxidized to supply energy to the organism.

The various methods by which glucose is broken down are listed below:-

• Aerobic Respiration

In aerobic respiration, pyruvate is broken down in the presence of oxygen, producing three molecules of carbon dioxide and water.

• Anaerobic Respiration

When there is no oxygen available, anaerobic respiration occurs. For instance, during the fermentation of yeast. Pyruvate is transformed into ethanol and carbon dioxide in this process.

• Lack of Oxygen

When there is a scarcity of oxygen in our bodies, especially during severe exercise, pyruvate is transformed into lactic acid, a three-carbon molecule complex. Muscle cramps are caused by the production of lactic acid.

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