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DNA is like an instruction manual for cells. It contains everything about a person. Everyone, apart from identical twins, has their own unique DNA.
To make some DNA, you will need:
100 ml rubbing alcohol
fine sieve or strainer
To make the DNA, you need to:
Place the rubbing alcohol in the freezer for 30 minutes before you start.
Then mash up some strawberries in a jar until they turn to pulp.
In a second jar, mix the water with a few drops of washing-up liquid and a pinch of salt. Stir them together very slowly as not to form bubbles. If you happen to get some bubbles, scoop them out and dispose of them.
Combine this mixture with the mashed up strawberries and mix together very slowly again for about two minutes. If froth forms, scoop it out and dispose of it.
Pour some hot water into a bowl and if needed, as some cold water until the temperature is stable at around 60C / 140F.
Stand the ajar of mashed fruit in the bowl and leave for about 15 minutes.
Push the strawberry mixture through the sieve into a fresh glass. The liquid is all you should have left.
Take the rubbing alcohol out of the freezer and dribble it very slowly down the side of the glass. It should settle on top of your mixture.
You should see a white, web-like layer forming between the liquid and the alcohol. The blobs of jelly-like DNA can be picked up on a hook made from the paper clip.
There are many other ways to make DNA, here are some of them:
Have you completed any DNA activities? Link them up in the comments if you have!
I found this experiment in a book called Science Experiments by Robert Winston.