Exploring DNA: Extracting DNA from Bananas for Fun Science Learning

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Dive into the fascinating world of DNA by exploring how to extract it from a banana! This engaging activity introduces you to the basic concepts of DNA and its role in living organisms. Did you know that a single banana contains enough DNA to stretch around the Earth three times? Discover the structure of DNA, learn about its presence in plant and animal cells, and follow a simple step-by-step process to extract DNA using mashing, salt solution, washing-up liquid, filtration, and ethanol. Perfect for science enthusiasts of all ages!

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May 08, 2026

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Exploring DNA: Extracting DNA from Bananas for Fun Science Learning

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Go Bananas! • Introduction • Tell you about DNA • Show you how to extract DNA from a Banana
What Do you know about DNA? Genes are made of DNA. Animal and plant cells contain DNA. A plant cell contains about 3 m of DNA. A meal is about 55,000,000 cells ... which is 165 million kilometers of DNA. This would stretch around the world three times!
DNA Structure
DNA in the Cell Nucleus Plant cell Cell wall Cell membrane Nuclear membrane

DNA extraction - Summary 1 Mashing: breaks down tough cell walls. 2 Salt solution: brings DNA strands together. 3 Washing-up liquid: – breaks down cell/nuclear membranes – clumps together other cell contents. 4 Filtration: removes other cell material. 5 Ethanol: brings DNA out of solution.