Question

I extracted DNA from strawberry. I had to answer: - Why did the DNA separate to the top after adding the isopropyl alcohol? - Does all of your food have DNA? Explain your reasoning. - Why is it important for scientists to be able to extract DNA? Provide two examples.

Answer 1

1. Isopropanol is a compound used to dissolve lipids and as a dehydrating agent. When mixed with DNA, they compete for water causing the DNA to dehydrate and separating the mixture into two phases.

2. Every living organism contains DNA. This includes plants and animals, and therefore most of the food we eat.

3. DNA contains the hereditary information of all living organisms.

For example, in humans it is important to extract DNA for the identification of diseases, their causes and possible treatments.

In food, DNA extraction can help in the production of transgenic foods.