These changes are not the same as mutations, which refer to alterations of the 'letters' of the DNA sequence itself. An epigenetic change would be like changing the letter 'a' into the letter 'A'. They are similar, but not the same. A mutation would be like changing the letter 'a&' to the letter 'b'. They are very different.
The lock and key model describes the key as a substrate and enzyme as a lock. It states that only the correct key will fit in the active site on an enzyme for a reaction to take place. It also says that active sites have a specific substrate shape that is rigid and only reacts with the perfectly fitting substrate.
Question: Why Is Enzyme Activity Similar To Lock And Key? This problem has been solved! See the answer. Why is enzyme activity similar to lock and key?
Dec 22, 2020 · DNA and RNA operate on a lock and key system. Foreign proteins, including viruses, do not contain the necessary RNA and DNA to be compatible with your own cells, since all cells in every body are minutely different, and operate only with the permission of other bodily functions and regulators (cytokines, immune cells, T-cells, and so forth).