26 Dec 2016, 12:31 am
techstepgenr8tion
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Age: 44
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26 Dec 2016, 12:33 am
26 Dec 2016, 12:47 am
29 Dec 2016, 1:34 am
248RPA wrote:
As we go through life, our cells divide over and over. Every time a cell divides, a little bit of DNA is lost, and DNA controls everything in our body.
They think that the lost DNA during cell division causes damage to our bodies' cells. Since our cells divide again and again as we get older, the damage accumulates. So that's why our bodies get frail and stuff when we're old.
They think that the lost DNA during cell division causes damage to our bodies' cells. Since our cells divide again and again as we get older, the damage accumulates. So that's why our bodies get frail and stuff when we're old.
it's not so much that the DNA is "lost", but i'm sure it does happen on occasion. all DNA is very important, coding sections that translate into RNA and amino acids especially, but even the noncoding "junk" DNA has its own use in functions relating to chromosome structure and cell division itself, and sequences relating to centromere function. i think we'd become invalid very quickly if we started losing even a little bit of DNA.
you're correct that mistakes accumulate over the years, and this may be a major factor behind aging and increases susceptibility to cancer and mutations, but many of these are mistakes made during transcriptions between other varieties nucleic acids or when constructing proteins. most mistakes in base sequences are fixed by the DNA polymerase or via enzymes after the fact, but stuff always falls through the cracks.
29 Dec 2016, 4:59 am
Kiprobalhato wrote:
248RPA wrote:
As we go through life, our cells divide over and over. Every time a cell divides, a little bit of DNA is lost, and DNA controls everything in our body.
They think that the lost DNA during cell division causes damage to our bodies' cells. Since our cells divide again and again as we get older, the damage accumulates. So that's why our bodies get frail and stuff when we're old.
They think that the lost DNA during cell division causes damage to our bodies' cells. Since our cells divide again and again as we get older, the damage accumulates. So that's why our bodies get frail and stuff when we're old.
it's not so much that the DNA is "lost", but i'm sure it does happen on occasion. all DNA is very important, coding sections that translate into RNA and amino acids especially, but even the noncoding "junk" DNA has its own use in functions relating to chromosome structure and cell division itself, and sequences relating to centromere function. i think we'd become invalid very quickly if we started losing even a little bit of DNA.
you're correct that mistakes accumulate over the years, and this may be a major factor behind aging and increases susceptibility to cancer and mutations, but many of these are mistakes made during transcriptions between other varieties nucleic acids or when constructing proteins. most mistakes in base sequences are fixed by the DNA polymerase or via enzymes after the fact, but stuff always falls through the cracks.
So what does viral DNA -- for example, from the Borna virus -- do for us if all DNA is very important?
