[header] How to build an edible model of a dna strand [title] Cut a single large strawberry into 8 smaller pieces. [step] Cut in any which way you chose as long as they are big enough to stick through toothpick. [title] Cut 4 grapes into halves. 
[substeps] Key note: by cutting the strawberry into eighths and four grapes in half, you will have double the amount of food needed. This is to your benefit, in case any problems occur in building the model.