MLA Header:
DNA Extraction: Strawberries
Pre-Lab
1. Go to the following website: http://learn.genetics.utah.edu/content/labs/extraction/
2. Click on “start lab” and follow the directions, reading each page.
3. Answer the following questions as you perform the virtual lab.
4. Questions:
a. Scientists isolate DNA for a variety of reasons, some of which include:
i. _______________________________________
ii. _______________________________________
iii. _______________________________________
b. Inside each nucleus is about _______________ meters of DNA.
c. The skin on the inside of our mouths loses ____________________ of cells every
day.
d. The four steps of purifying DNA from a cheek swab are:
i. ______________________________________________________
ii. ______________________________________________________
iii. ______________________________________________________
iv. ______________________________________________________
e. The name of the protein that DNA wraps around is called
___________________________
5. At the end, click on “How to extract DNA from anything living”
6. Questions:
a. What was the purpose of each of the following in the DNA extraction?
 Peas__________________________________________________________
 Salt ___________________________________________________________
 Water_________________________________________________________
 Detergent ______________________________________________________
 Meat tenderizer _________________________________________________
 Alcohol ________________________________________________________
b. What part of the cell did the DNA come from?
c. From what part of the body can crime scene investigators obtain DNA?
d. How many membranes have to be broken to extract DNA?