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  • Hi, I am Benyamin. Today I am gonna show you

  • how extract DNA from a Strawberry at home

  • In order to study DNA scientists have to

  • extract it from cells

  • there are many DNA extraction kits

  • available for scientists to use in the lab

  • but they all work in roughly the same way

  • This experiment lets you make your own

  • DNA extraction kit from common household materials

  • okay, lets check it out

  • Here is what you need

  • Isopropyl alcohol or rubbing alcohol

  • dish soap, salt, water, plastic bag

  • beaker or test tube

  • or you can use a small clear glass jar

  • measuring cups, strainer, tweezers and safety glasses

  • Step 1: put the isopropyl alcohol or rubbing alcohol in

  • the freezer to chili it

  • Step 2: Measure 100 ml of water then add

  • 10 ml of dish soap and half of teaspoon

  • salt to the water and mix it up

  • this will be your extraction liquid

  • Step 3: put the strawberry in the plastic bag

  • and then add the extraction liquid you just

  • made to the plastic bag too

  • Step 4: Remove as much air as possible

  • and seal the bag

  • after that mash the strawberry with your

  • hands for 2 minutes until there are no big pieces

  • this is what it will look like

  • Step 5: use a strainer to separate the liquid

  • from the strawberry pulp

  • Step 6: Now, transfer the liquid to a small beaker

  • or a small clear glass jar

  • Step 7: add 5 ml of iced Isopropyl alcohol

  • or Rubbing alcohol and wait for a few minutes

  • the alcohol will form a layer on top of

  • the strawberry juice

  • Step 8: okay, now you should see stringy

  • whitish stuff collecting between two layers of liquid

  • this is DNA !

  • you can gently pull the DNA out with the tweezers

  • the detergent I used caused the cells

  • to pop open or lyse

  • this releases the DNA into the solution

  • and the alcohol causes the DNA

  • to precipitate out of the solution

  • you can do this experiment on most any living thing

  • try this experiment using other fruits, vegetables

  • or soft meats like chicken liver

  • Please share your opinions and video responses

  • in the comments with us and be sure

  • to subscribe us by clicking here

  • because amazing videos will come soon and

  • as always thanks for watching

Hi, I am Benyamin. Today I am gonna show you

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B2 中高級

在家從草莓中提取DNA--酷炫的科學實驗。 (Extract DNA from a Strawberry at Home - Cool Science Experiment)

  • 267 22
    Cheng-Hong Liu 發佈於 2021 年 01 月 14 日
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