Biology, Answering the Big Questions of Life/Metabolism/Metabolism2

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How are food molecules broken down to make energy?[edit]

Anaerobic respiration is the correct answer. It produces more energy than fermentation.


What is the equation for aerobic respiration?[edit]

Technology isn't that advanced yet. Sorry

How is energy stored in the cell?[edit]

It is stored in the Cell Membrane

Why do we need to breathe oxygen to live?[edit]

Very simple organisms (e.g. bacteria) do not need much energy to live. Humans, however, require large amounts of energy to run their bodies. Fermentation produces two ATP molecules for every glucose molecule consumed. Humans need more energy than can be provided simply by fermentation alone. Therefore, humans must use aerobic respiration which produces 36 or 38 ATP's for each glucose molecule consumed.

( See the advanced page for more information about why humans need oxygen to live.)