DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). DNA is usually a double-helix, and has two strands running along each other. The two strands of the DNA are made of chains of alternating sugar and phosphate.
The licorice on the edible DNA model represented the two strands known as polynucleotides, which is the sugar and phosphate pattern. The marshmallows represented thymine, guanine, cytosine and adenine. And the toothpicks on the DNA model represents the rungs that hold everything together. The green marshmallows represented guanine, pink represented cytosine, orange represented adenine and yellow represented thymine.
This activity helped me understand DNA a lot better because it gave me a better idea of what DNA is and how it works. I also got to build the DNA so that really helped me understand the structure.