Here we learn how cells make a copy of their DNA
Conservation of the genetic code
When cells make copies of their DNA, the copying is almost exact.
However, a small number of mistakes may occur. We call this a mutation.
Why is DNA double-stranded?
Isn’t that a waste to have a gene written twice?
It It Would Would Like Like Be Be Writing Writing Each Each Word Word Twice Twice
Cells do this because it allows copies to be made exactly & quickly.
Looking at the base pairing, up close
This process is mind-bogglingly fast. This video shows the amazing speed at which this takes place: