DNA Replication Illustrations
Name
Per. ________ Date ________
You will draw out the DNA replication steps of Interphase. In each box, draw the event described. You must label all the bold words in each
drawing. Pay attention to the specific coloring directions. Use chapter 12 (Section 2) in your book to help you.
1. Draw a wound (spiral)
molecule of DNA. Use
multiple colors for nitrogen
bases, sugars and phosphates.
Label all major parts.
Give your double helix the
following sequence:
ACCGTATTGATC
2. Draw an unwound DNA
molecule, to show that it is
ready to replicate.
3. Draw your DNA molecule
being unzipped.
4. Show a single strand of
your DNA molecule being
copied.
Label DNA helicase.
Label your deoxyribe sugars
and phosphates.
Use same colors as in
box #1
Draw and label the new,
complementary nucleotides.
You may use one single color
to represent the rails of this
strand of DNA (the old
strand).
Label DNA Polymerase.
Use a different color for the
rails of the new strand.
5. Illustrate your two identical
strands of DNA after the
fragments have been pieced
together.
Label your sequences.
Represent your “old” DNA
strands and your “new” DNA
strands with different colors.
Name ___________________________________________________ Date ___________________ Period ______
DNA Replication Notes
1. Observe the model of DNA. Use the box below to write what you know about its structure.
2. Can you remember? When does DNA replication take place during the cell cycle (be specific!)?
3. Where does replication DNA replication take place within the cell? Hint: think about where DNA is found!
4. Form a hypothesis. How do you think a cell goes from having one molecule of DNA to two molecules of DNA? Keep in
mind, it is very important for these molecules to be completely identical to each other.
DNA Replication – The Process
5. What is the overall purpose of DNA replication?
6. In order for replication to take place, DNA must first unwind and _______________________________.
a. Which enzyme is responsible for this?
b. The sites where DNA “separates” for replication are known as _______________________________.
7. Each original strand of DNA will now serve as a _________________________ for the new strand.
8. The new, ____________________________ nucleotides must now be added to the original strand.
a. Which enzyme is responsible for building the new strand?
9. If the original strand of DNA contains the following sequence: G T C A T T C G A, what would be the sequence of
complementary nucleotides added during replication?
10. In reality, this is taking place in many locations at once. This creates ________________________________.
a. Which enzyme is responsible for putting these pieces together?