Why is it important for cells to have two ATP production pathways?

Why is it important for cells to have two ATP production pathways, even though one is much less efficient than the other? Just sort of curious as to why this happens.

3 Answers

Relevance
  • 8 years ago
    Favorite Answer

    If oxygen is present, cells use glycolysis to produce ATP. To put it simply:

    A single molecule of glucose splits in two producing 2 molecules of pyruvic acid. It is then followed by the Krebs Cycle and the electron transport chain. Overall, this process produces a net gain of 36 ATP molecules. However, if a cell lacks in oxygen, then this process cannot take place. That is why the cell must resort to fermentation to gain the ATP it needs to perform basic functions. In people, the type of fermentation that takes place is lactic acid fermentation. Lactic acid converts NADH to NAD+, allowing glycolysis,which does not require oxygen, to continue. Although it only produces a net gain of 2 ATP molecules the process can be helpful in providing ATP in a time of need.

    Source(s): Personal knowledge.
    • Login to reply the answers
  • 3 years ago

    He proposed the citric acid cycle (additionally widely used because of the fact the Krebs cycle) it relatively is a factor of the approach utilized by employing living cells to hire oxygen to interrupt down carbohydrates, fat and proteins into carbon dioxide and water to launch potential. He develop into offered the Nobel Prize in medicine in 1953 for this discovery.

    • Login to reply the answers
  • 8 years ago

    Just in case your body doesn't have enough oxygen, you still need to have a way to get energy to carry out the basic life functions - heart pumping and brain operation.

    • Login to reply the answers
Still have questions? Get your answers by asking now.