Why does food rot?

BBC Earth (Asia) - - Q&A -

As cells die, their mem­branes de­grade and en­zymes start leak­ing out. The cell di­gests it­self, then neigh­bour­ing cells, and the process cas­cades. Without any im­mune re­sponse to stop them, bac­te­ria and fungi will also be­gin eat­ing the food and mul­ti­ply­ing. As they munch away, they al­ter the tex­ture of the food and re­lease waste prod­ucts that change the taste. There are purely chem­i­cal rot­ting mech­a­nisms too, like fat ox­i­da­tion, which makes it taste ran­cid. LV

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