Instructables

How to Make a DNA Model Out of Candy

Picture of How to Make a DNA Model Out of Candy
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DNA is deoxyribonucleic acid. It contains the genetic instructions used in the functioning and development of all living orgainisms and some viruse.Bored with your project on DNA? Just realized that it's due tomorrow? Well keep reading, even if you don't have to create an accurate model of DNA! It's really fun, and there's always leftover candy.

Materials:

For Model:
Gummy Bears (at least four colors)
Toothpicks
String
Red Licorice (cut into 1 inch pieces)
Black Licorice (cut into 1 inch pieces)
Small Marshmallows
Masking Tape

For Key:
Paper/Poster Board
Markers, pens, etc.
Glue or Tape
 
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Step 1: Make a Key

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First, you will need to know what is what on your DNA model. Write "Key" on the top of your poster board/paper. Then, glue or tape on a piece of black licorice. Label it "phosphate groups". Attatch a piece of red licorice and label it "sugar deoxyribose". These two make up the sugar-phosphate backbone of DNA. Take one gummy bear and attatch it to the paper. Label it "adenine". Then, take a different color bear, attatch it, and label it "thymine". Attatch another color and label it guanine, and then attatch another color labeled "cytosine". These are DNA's four bases. Attatch a marshmallow and label it "hydrogen bonds that connect the bases". If you want some extra credit, try adding these facts:

The order of the bases determines the type of organism and its functionality.

DNA's shape is a right-handed double helix.

Step 2: Create the Backbones

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Cut a piece of string about 3 inches longer than you want your model to be. Wrap masking tape around one end (to keep the licorice from falling off). String on alternating colors of licorice. When you reach your desired length, finish with masking tape. Repeat with one more piece of string, making sure that the lengths are the same. The colors of licorice should match (ex: red, black, red, black, etc.).
THNX FOR THE INFO. BUT PEALSE CAN U PUT A PICTURE OF IT WHILE IT IS TWISTED BECAUSE I AM REALLY CURIOUS TO SEE IT
cupcake811 (author)  nonnyxbloOdiE4 years ago
I made this a LONG time ago, so I don't have one. It won't stay twisted...sorry. It looks pretty much like you would think it look. If you want, you can look up a picture of a double helix.
CAN U SHOW US THE CANDY DNA MODEL WHILE IT IS TWISTED PLEASE
LkArio4 years ago
You could use a chopstick to make it a double helix
cupcake811 (author)  LkArio4 years ago
The "bases" and "hydrogen bonds" are on toothpicks connected to alternating colors of licorice that are the "sugar deoxyribose" and "phosphate groups". Then, you twist it so that it forms a double-helix.
lemonie4 years ago
I'm sure this is great, but I can't see it. Have you got a nice picture of the double-helix? L
cupcake811 (author)  lemonie4 years ago
Here you go! Sorry it isn't twisted.
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Ah yes I see it now, thanks L