Extracting DNA from Fruit: A School Laboratory Method

The video tutorial explains the process of extracting DNA from fruit in a school laboratory setting. It begins with an introduction to DNA and its significance. The tutorial then details the steps to prepare a solution with salt and detergent, mash and mix fruit, heat the mixture, and filter it. The extraction process involves adding protease enzyme and ethanol to isolate DNA, which forms a visible precipitate. The video concludes with the successful extraction of DNA, highlighting the importance of each step.

What is the primary role of DNA in an organism?

• To protect against diseases

• To transport nutrients

• To provide energy

• To store genetic information

Why is salt added to the initial solution in the DNA extraction process?

• To help DNA precipitate later

• To make the DNA more visible

• To dissolve the DNA

• To change the color of the solution

What is the purpose of adding detergent to the solution?

• To break down cell membranes

• To increase the temperature

• To neutralize the solution

• To enhance the flavor

What is the next step after mixing the fruit with the solution?

• Placing it in a water bath

• Freezing the mixture

• Cooling the mixture

• Boiling the mixture

What is the role of protease enzyme in the DNA extraction process?

• To dissolve the DNA

• To break down proteins

• To solidify the DNA

• To color the DNA

Why is ice-cold ethanol used in the DNA extraction process?

• To change the pH level

• To dissolve the DNA

• To heat the solution

• To precipitate the DNA

What indicates the successful extraction of DNA in the final step?

• A bubbling reaction

• A white precipitate layer

• A change in color

• A temperature increase