Question

3. Why salt is added to isolate DNA?​

Answer 1

Answer:

By adding salt, we help neutralize the DNA charge and make the molecule less hydrophilic, meaning it becomes less soluble in water. The salt also helps to remove proteins that are bound to the DNA and to keep the proteins dissolved in the water. ... The dish soap pulls apart the membranes, releasing the DNA.

Explanation:

Sodium chloride helps to remove proteins that are bound to the DNA. It also helps to keep the proteins dissolved in the aqueous layer so they don't precipitate in the alcohol along with the DNA.

Answer 2

Answer:

By adding salt, we help neutralize the DNA charge and make the molecule less hydrophilic, meaning it becomes less soluble in water. The salt also helps to remove proteins that are bound to the DNA and to keep the proteins dissolved in the water. The dish soap pulls apart the membrane, releasing the DNA..

Hope this answer will helps you