Go Bananas! Introduction Tell you about DNA Show you how to - PowerPoint PPT Presentation

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.