Question

question 10
dna became visible to the naked eye after what stage in the fruit - dna - extraction experiment?
a mashing the strawberries
b pouring cold ethanol into the strawberry solution
c straining the solution to remove cloudiness from solids
d mixing the strawberries in the buffer solution

Explanation:

In the fruit - DNA - extraction experiment, DNA is not visible during mashing (A), straining (C), or mixing with buffer (D). When cold ethanol is poured into the strawberry solution (B), DNA precipitates out. DNA is insoluble in ethanol, so it clumps together and becomes visible to the naked eye.

Answer:

B. pouring cold ethanol into the strawberry solution