CB3bii Flashcards
1
Q
Describe the method used to extract DNA from fruit
A
Place a piece of fruit in a beaker and crush it
Add detergent and salt mix
Filter the mixture and collect the liquid in a test tube
Pour chilled ethanol into the test tube
DNA precipitates forming a fibrous white solid
Use a glass rod to collect the DNA sample
2
Q
Why is detergent added to the crushed fruit
A
It disrupts the cell membranes, releasing DNA into solution
3
Q
Why is salt added to the crushed fruit
A
Salt encourages the precipitation of DNA
