K-12 Private Christian School in Northwest Houston, TX

Extracting DNA from Strawberries

While learning about the structure of DNA, biology students extracted DNA from strawberries. By doing this activity, students were able to see the long, thick fibers of DNA. Students used an extraction buffer containing salt to break up protein chains that bind around the nucleic acids and dish soap to dissolve the lipid part of the strawberry cell wall and nuclear membrane. Once this was done, cold isopropyl alcohol was used to cause the DNA to precipitate out of the solution allowing the students to see and hold DNA.