How old is DNA? - Biology Forum

last updated by

Sepals 18 years, 9 months ago

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- March 15, 2006 at 9:28 pm #4041
  oscar91
  Participant
  How old is dna and how old are you all?
- March 15, 2006 at 9:40 pm #43414
  Master DRe
  Participant
  DNA is old as well as the first microorganism appear on earth??
- March 18, 2006 at 12:23 pm #43655
  victor
  Participant
  But, based from my book, I’m sure that DNA is younger than RNA..:lol:
- March 18, 2006 at 5:28 pm #43684
  Remote
  Participant
  about 4 billion years
- March 18, 2006 at 6:15 pm #43686
  alextemplet
  Participant
  Don’t you mean 4 billion?
- March 19, 2006 at 6:37 pm #43735
  Sepals
  Participant
  quote oscar91:
  How old is dna and how old are you all?
  It depands on the cell the DNA is in. For eg, if it’s in a cell with a short life span, it doesn’t get old. For something like bone cells, those last a long time, like a life time. Saying that when cells in eukaryotes divide the DNA replication is semi-conservative which means maybe there is DNA within animals which lasts from birth to death (I no longer study cell bio so I’m a bit vague on this topic). As for how long DNA has existed on Earth: just under 4 billion years.
- March 19, 2006 at 6:38 pm #43736
  Sepals
  Participant
  quote victor:
  But, based from my book, I’m sure that DNA is younger than RNA..:lol:
  Yes DNA evolved from RNA which was the original genetic material. This came from repilcating clays. There is a thread on this if ppl want more info.
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