Question

How could you determine what percentage of a strawberry's mass is dna?

Answer 1

First  you  determine  the   total mass  of  the   strawberries used
Then  determine  the    mass  of  the   DNA  obtained  from  the  strawberries
percentage  mass  is  therefore  equal  to  mass  of  the  DNA  obtained  divided  by  total  mass  strawberries  multipy  by   a  100

Answer 2

Weigh the strawberry and record its total weight. Cut off a small piece of the strawberry, weigh the piece, and record the piece's weight. Crush the weighed piece and treat it with a substrate that will suspend particles with negative charges. Filter the materials suspended in the substrate to isolate the strands of DNA. Use imaging tools to find the exact mass of the DNA. Divide that mass by the mass of the strawberry piece and multiply by 100% to get the percentage of the strawberry's mass that is DNA.