How to Build a DNA Molecular Model
Elementary school students often have a difficult time understanding what DNA is since they aren't able to see it. While you can educate them about how it is in their hair, saliva, skin and other body components, this doesn't explain what DNA looks like. Since most schools don't have high-powered, precision microscopes that allow you to see DNA, help them understand and visualize it by building a DNA molecular model.
Things You'll Need
- Play-Doh
- Licorice
- Toothpicks
- Miniature marshmallows
- Tape
- Pins
- Paperclips
- Paper strips
Instructions
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1
Create the outside lines. Roll out Play-Doh into two long, narrow strips or use licorice if you want to make an edible DNA model. Place the strips parallel to each other on the table in front of you.
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2
Stick in toothpicks. Place toothpicks on the inner side of one of the strips of Play-Doh or licorice. Ensure toothpicks are evenly spaced. The model in front of you on the table should appear to be a ladder with one side not connected.
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3
Rub bits of Play-Doh between your palms to make little balls or use miniature marshmallows. Insert the balls or marshmallows into the point of the toothpick that is still exposed. Slide the balls or marshmallows over until they are evenly spaced between the sides and each other. Connect and twist.
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4
Connect the other strip of Play-Doh to the exposed toothpick side after all the balls or marshmallows are on the toothpicks. Once again the DNA model should resemble a ladder with two balls on each step.
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5
Twist the model as though you were making it into a spiral slide. The DNA molecular model is now complete.
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6
Use tape, pins or paperclips to secure written labels to each part if needed.
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Tips & Warnings
Many other household items can be used to create a DNA molecular model including bread dough, grapes, beads and more.
References
Resources
- Photo Credit dna image by chrisharvey from Fotolia.com
