Soluzione del esercizio 7 di Into Focus B2

Esercizi svolti per il libro Into Focus B2

Soluzione

  1. When you gargle the salt water and spit it back out
  2. the more cheek cells will collect in the salt water
  3. This causes the DNA to be released into the salt water
  4. so it forms a solid
  5. The white strings and clumps you see
  6. In order to get the DNA out of your cells
  7. like all soaps
  8. This is why you use detergents
  9. By adding the detergent to your cell solution
  10. when alcohol is poured on top of the solution
  11. while the lipids and proteins stay in the solution