DNA
On the 20th
March I went to Bancroft’s school for a science fair. My favourite area we
looked at was about DNA (deoxyribonucleic acid). I learnt that it could be made
from my own saliva! It is a molecule that encodes genetics and is a mix of
hydrogen, oxygen, nitrogen, carbon and phosphorus. First, we were given a tray
and a small bottle of a transparent liquid (phosphorus). Then, some people gave
us sticks and told us to rub it in our mouths and on our gums. We dipped our
sticks in the phosphorus and then took the stick out. Then we extracted the
main DNA. We then put it in a smaller bottle and tied a piece of string to it
to keep it secure.
We also tried
to draw patterns in a mirror. They gave us a star to copy in a mirror. We had
to try and keep the pencil on the lines but mine looked terrible!
By Branaven
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