Explanation:
a.)oxygen availability became limited
Oxygen is the terminal electron acceptor in the electron transport chain. Reduced oxygen, or hypoxic conditions, would lead to less ATP production over time.
Further Explanation:
In all eukaryotic cells mitochondria are small cellular organelles bound by membranes, these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced.
Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate (obtained through the process of glycolysis or glucose splitting in the cytoplasm).
During respiration...
- Oxidative phosphorylation describes a process in which the NADH and FADH2 made in previous steps of respiration process give up electrons in the electron transport chain these are converted it to their previous forms, NADH+ and FAD.
- The electron moves down an electron transport chain where it experiences continuous energy loss. This energy fuels the pumping of H+ out of the matrix of the mitochondria.
- This forms a gradient where there is a differential in the number of protons on either side of the membrane the protons flow or re-enter the matrix through the enzyme ATP synthase, which makes the energy storage molecules of ATP from the reduction of ADP. At the end of the electron transport, three molecules of oxygen function as terminal acceptors for electrons and protons to form molecules of water
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