There is junk DNA or non-coding DNA. This DNA is the segment before the promoter of a different gene.
junk DNA
You are 98% junk.
Coding DNA refers to the portion of DNA that contains instructions for making proteins, while junk DNA, also known as non-coding DNA, does not encode proteins. Junk DNA plays roles in regulating gene expression, chromosome structure, and other cellular functions, although its exact functions are still being explored.
They are called non-coding DNA. It was called "junk DNA" at one time by people doing research on DNA because they didn't think these DNA codes had any use. Now they know that they have uses and so have stopped using that name "junk DNA".
If we didn't have junk DNA any mutation would cause damage to essential sequences of DNA and likely kill the host. It would be to dangerous to be in the sun because uv radiation cause mutations. However most of the mutation occur in the non essentioal junk DNA thus protecting essential DNA.
The conservation of "junk DNA" sequences in diverse genomes suggests that they have important functions.
"Junk" DNA isn't just junk. It also contains inactive genetic code. For example, we still have genetic code for a prehensile tail in our DNA. Rarely, this becomes activated in humans today which results in a vestigial tail.In the junk DNA we find all sorts of interesting correlations between species that gives a greater depth of knowledge about where we came from.
Junk DNA
Non-coding DNA, also known as non-coding regions or junk DNA, refers to segments of DNA that do not code for proteins. While once thought to have no biological function, non-coding DNA is now known to play roles in gene regulation, chromosome structure, and evolutionary processes.
Junk DNA
Junk DNA gene
The cast of Das Geheimnis der Junk DNA - 2009 includes: Michael Bideller as Narrator Susanne Sternberg as Narrator