We are studying the structure of DNA.
DNA extraction from strawberry.
Materials needed: Zip lock bag, two strawberries, 30 ml water, teaspoon dishwashing liquid (detergent), 2 ml salt, sieve
Step 1: Place strawberry in zip lock and squish.
Step 2: Mix salt, water and detergent. Add to zip lock. Mix with strawberry mush.
The detergent dissolves the phospholipid layers of the membranes. The salt makes the DNA less hydrophilic.
Step 3: Filter the liquid into the glass beaker using the sieve.
Add approximately 2 cm cold methylated spirits slowly on top of the strawberry extract.
Use toothpicks to twirl the DNA out of the methylated spirits.
Building a DNA model