Many of the proteins in any living creature are held in their shape by a type of weak bond called a Hydrogen bond. What makes a protein work is its shape.
Now, you may or not be aware, but what your DNA does is have the codes for proteins. Everything that makes you you is either directly proteins or is controlled by proteins. And if they can’t do there thing… life doesn’t work.
It’s the same for bacteria. If you get them hot enough they start to break down and life stops.
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