After reading the procedure and performing the DNA extraction, answer the following questions.

1. What is the purpose of the following equipment or compounds:

• Coffee grinder -
  
• Dry ice -
  
• CTAB buffer -
  
• Heat bath -
  
• Chloroform -
  
• Centrifuge -
  
• Ice-cold isopropyl alcohol -
  
  

2. Explain how the differences in polarity of the solvents (salt-water-CTAB solution, chloroform, isopropyl alcohol) allow this procedure to work.

3. Given that animal cells don't have cell walls or as many polysaccharides in them, what might you do differently to isolate DNA from animal cells?