A continuous disintegration occur.
During the Calvin Cycle in photosynthesis, the 6 carbon molecule splits into 2 PGA (Phosphoglyceric Acid) 3 carbon molecules.
An unstable nucleus loses particles until it becomes stable.
Nothing "happens to it" unless something happens to it. In other words, your question is missing the "when" part ("what happens to a molecule of protein WHEN ..."). Even then, it depends on the details; different proteins react in different ways.
The potential energy of the molecules change during a reaction.
it separates from the membrane.
Atoms change the position from a molecule to another.
it separates from the membrane.
it separates from the membrane.
During thermal shock the temperate rises or falls at an unstable rate. When this occurs it can cause the structural integrity of an object to become damaged.
mRNA is synthesized on only one of the chains
During a physical the molecules act or behave differently by speeding up and sowing down. A chemical change makes the molecule into a different molecule.
Reactants are consumed during a reaction, the results of the reaction are products. The reactants can be an element, molecule, or selection of different molecules.