DNA Structure and Replication Models
Name:_________________________
I.
Supplies:
1.
2.
3.
4.
II.
4 different types of mini-marshmallows
2 Twizzlers
16 Toothpicks
Colored Pencils to match your marshmallows
Directions:
1. Select your 4 colored Marshmallows. Choose which marshmallow
will represent each nitrogen base. Draw a Key below:
2. Assemble your DNA strand. Your strand should have 8 pairs of
nitrogen bases.
3. Write out your strand of DNA’s genetic code below:
4. Draw a picture of your strand of DNA labeling the nitrogen bases.
III.
Replication:
1. “Unzip” part of your DNA (leave it partially zipped!)
2. Add extra marshmallows to show the beginnings of replication.
3. Draw a picture of your partially replicated DNA strand.
4. Have Mrs. Hanson initial here ________________ once she has
checked your DNA!
5. Answer the questions below while enjoying a sweet genetic snack!
IV.
Questions:
1. What is DNA made out of?
2. What are the pairs of nitrogen bases that always go together?
3. How does DNA replicate?
4. What is DNA?
5. Why is DNA important to living things?