Helix DNA Model
|Making a model is the
best way for learning about the elements of a DNA molecule. You can
use your model as a separate school project or as an addition to
any DNA related science project.
A well constructed model enhances your
display and results a higher level of attention to your
described here is the same model suggested in ScienceProject.com
for DNA related science fair projects.
|Material: To construct
a DNA model you will need the following material:
- Styrofoam balls (about 100)
- Double end toothpicks (75)
- Wooden or metal laboratory
- Brushes for painting the balls
- Additional material such as
paint or water color, glue, string.
You may purchase all the required
material separately from different local stores or you may prefer
to order a kit; however, you should know that kits do not come
with paint and glue.
You may already have white glue and
water color at home. If not, you may purchase paints and glues from any
local hardware store or paint store.
DNA model kit comes with 100 white balls that you
must paint them with any water based or latex paint. (paint is not
A kit also contains a base and a column that together form a
stand for your DNA model.
A stand makes it easier for your model to be transported from
home to school or your science fair.
Kit also includes brush and
matching toothpicks for the balls.
This is a short
instruction. If you purchase a kit, please use the URL or web address
provided in the kit to access a more comprehensive instruction and tutorial
for making your DNA model.
|Decide what colors you
want to use for small molecules forming each large DNA molecule.
The model shown above is based on colors suggested in the kit
instructions; however, you may select any other colors for the
Paint all the balls and let them
dry. Depending on the paint it may take up to 24 hours for paints
Assemble your stand if it is not
already done. A wooden stand is proffered for your model because
of lighter weight.
Start from the base and connect the
molecules to each other using toothpicks. The large DNA molecule must
wrap around the stand's column.
For the first row make a pair of C-G
(Cytosine-Guanine). Add the phosphates to the backbone and then assemble
the second row that again can be C-G or A-T (Adenine-Thymine).
Continue the ladder until you run out
Note that in constructing the DNA model, we used
one ball for each small molecule forming the DNA polymer.
You may use the same
balls as atoms to make models of models of different chemicals.
in the left shows a molecule of Acetone. White balls are Hydrogen.
Black balls are carbon, Red ball is Oxygen (connected with two
Image on the
right is a molecule of Benzene.
You can order a small kit for $20
and make a DNA model about 28" tall.
Add $5 and order a medium kit for $25
and make a DNA model about 34" tall.
A large model kit costs $35
and can be used to make a DNA model about 40"