Question: What is The Structure of DNA?

To initially see how DNA is organized, form a model of it. This is a streamlined model of DNA, however, now it will give you the general image of how the sugars, phosphate groups, and bases all interface together to make the well known double helix state of DNA. You can make a DNA model out of an assortment of materials. In this experiment we will be using gummy bears to build a DNA model.


Materials Needed:

Mini marshmallows

Red and black hollow licorice sticks



Gummy bears


  1. Cut the red and black licorice sticks into one inch strips.
  2. Make two equivalent lengths of licorice strands by threading the bits of licorice onto the string, exchanging the red and black pieces.
  3. Assemble four unique shades of gummy bears, marshmallows, and toothpicks.
  4. Combine two shades of the gummy bears together and after that match two different colors together. For instance, red and orange gummy sets could be matched together, green and yellow ones could be combined together.
  5. Take a gummy bear and string it onto the toothpick. String the marshmallow onto the toothpick with the goal that it is in the focal point of the toothpick and alongside the gummy bear. String the reciprocal gummy bear onto the toothpick with the goal that it is by the marshmallow. You ought to now have a toothpick with a gummy bear marshmallow gummy bear focused on it.
  6. Repeat step five to make more gummy bear marshmallow toothpicks, ensuring the gummy bears are coordinated with their correlative hues. Make the same number of these toothpicks as you have red pieces on one of your licorice strands.
  7. Take one strand of licorice and begin appending the gummy bear marshmallow toothpicks to it, interfacing one of these toothpicks at each of the red pieces on the strand. At that point, take the second licorice strand and interface it to the opposite side of the toothpicks. Once more, associate the toothpicks to the red bits of licorice. You should wind up with a ladder with the red and black licorice stands making the sides of the ladder and the gummy bear marshmallow toothpicks making the rungs of the ladder.
  8. Hold the candy ladder up and turn the top counterclockwise to add the twists to the ladder.


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, together they both represent the sugar-phosphate backbone of DNA.

The gummy bears represent the bases that make the code of DNA. The four unique colors are utilized to represent the four distinct bases found in DNA: adenine (A), thymine (T), guanine (G), and cytosine (C). It doesn't generally make a difference in your model the amount of a base you utilize or where it is put in the strand, yet it is imperative that bases are matched up accurately: A with T and G with C. In genuine DNA, the order does make a difference as that decides what kind of life form it is and how it will behave.

The marshmallow in the middle of the gummy bears represents the hydrogen bonds connecting the bases. This is the time when the DNA strands begin to come apart as they replicate and where the new strand associates with the first strand. Twisting the ladder at the top in a counterclockwise heading gives the DNA model its actual shape; a right-handed double helix.

Posted by Paula Chen on 04 April, 2017 biology science projects, elementary, life science projects, middle school |
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