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Revise: Factors affecting respirationFermentation

Most cell activity requires chemical energy. Respiration is the cellular process of releasing energy from food. Aerobic respiration releases fifteen times more energy than fermentation.

Part of BiologyRevise: Photosynthesis and respiration

Fermentation

The overall process of fermentation in animal cell and plant and yeast cells are shown in the diagram below.

The overall process of fermentation in animal and plant cells. Animals: glucose through enzyme controlled reactions becomes a small amount of energy and lactic acid. Plant cells: glucose through enzyme controlled reactions becomes a small amount of energy, ethanol and carbon dioxide.

15 times more energy is released per molecule of glucose when oxygen is present and aerobic respiration occurs.

The process of respiration is controlled by specific enzymes so is affected by the temperature of the cell environment.

Graph showing rate of respiration on y axis and temperature on x axis. The graph rises at a 45 degree angle until about three quarters of the way along the x axis then falls steeply.
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