Biology Science Project

There are many biology science project possibilities these days. Many of them focus on plants, and animals and how they grow. One project that has not been overdone, and can be done in many different ways is the biology science project that extracts DNA. Deoxyribonucleic acid, or DNA is the building block of any living organism. Each cell of every organism carries inside it the DNA of that living thing. This project shows students how to extract DNA, making it original each time because there are so many living things to choose from! 
The simplest living thing you can extract DNA from is a fruit. Try getting a fruit that you can easily mash. A banana, a mango, or a papaya are some good examples of fruit that can be mashed. This project uses the knowledge that DNA is stored in the cells of a fruit, and that the DNA in the cells can be extracted once the cells are more separated or mashed up. The DNA from the fruit will be extracted by a mixture of liquid detergent, distilled water, and salt. Specifically, the mixture will be six grams of salt, twenty cc of liquid detergent, and one hundred eighty cc of distilled water. This mixture has to be prepared very carefully, making sure the salt dissolves in the water first and then the detergent is added and stirred in without making any bubbles. 
For this biology science project, the pulp (about 200 grams) should be placed in a glass container that can be placed in a pot of water that's been heated to one hundred forty degrees Fahrenheit. Before placing the container into the water, pour in the detergent, water, and salt mixture. This will help break down the cells even more. Make sure the temperature of the pulp is even the allow it to cool for a quarter of an hour. Once it is done with its cooling time, place the glass container in an ice bath. After five minutes of cooling bath, you can strain the pulp with a sieve and some filter paper, making sure only liquid is extracted from the now somewhat liquefied pulp. This liquid is what you will use to extract DNA. 
The last step is to take five cc of the DNA liquid and mix it with one cc of freshly squeezed pineapple juice. Let this sit for about two minutes before carefully adding six cc of ice cold alcohol (previously put in the freezer overnight in an airtight container.) When you slowly put in the alcohol, you will see that the once clear mixture will now have a milky substance and will change color. The presence of color in this biology science project proves the presence of DNA! You have successfully extracted it!
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