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To help further understand how DNA is structured, build a model of it. This is a simplified model of DNA, but it will still give you the general idea of how the sugars, phosphate groups, and bases all connect together to make the famous double helix shape of DNA. You can make a model out of a variety of materials. Here's how you can do it with candy.
You have just made a candy model of a strand of DNA. The red licorice represents the sugar deoxyribose, the black licorice represents the phosphate groups, and together they represent the sugar-phosphate backbone of DNA.
The gummy bears represent the bases that make the code of DNA. The four different colors are used to represent the four different bases found in DNA: adenine (A), thymine (T), guanine (G), and cytosine (C). It doesn't really matter in your model how much of a base you use or where it is placed in the strand, but it is important that bases are paired up correctly: A with T and G with C. (In real DNA the order does matter as that determines what type of organism it is and how functional it will be.)
The marshmallow in between the gummy bears represents the hydrogen bonds connecting the bases. This is the point at which the DNA strands break apart during replication and where the new strand connects to the original strand. Twisting the ladder at the top in a counterclockwise direction gives the DNA model its true shape: a right-handed double helix.