Each step in the extraction procedure aids in isolating DNA from other cellular materials. Explain
why each step was necessary and put the DNA extraction procedure into context by answering
the
questions below.
1. Why did you have to mash the strawberries?
2. What was the purpose of the salt in the DNA extracting solution?
3. What was the purpose of the soap in the DNA extracting solution?
4. Explain what happened in the final step when you added alcohol to your strawberry extract.
(Hint: DNA is soluble in water but not in ethanol)
5. What did the DNA look like? Draw a section of DNA.
6. Is there DNA in your food? How do you know?
7. Why is it useful for scientists to be able to extract DNA from an organism? List two reasons.
