DNA Replication Worksheet
Name: ___________________________________
1. Review: What are the 3 parts of a nucleotide?
a. ______________________________
b. ______________________________
c. ______________________________
2. Review: What are the 4 nitrogenous bases found in
DNA, and which ones pair with which others?
_____________________________________________
_____________________________________________
_____________________________________________
3. Review: On the drawing at the top right of this page,
label the 5’ and 3’ ends of each strand of DNA.
4. What is a telomere? What would happen if we didn’t
have telomeres?
5. Write the nucleotide sequence for a DNA strand complementary to: 5’ AAGAGTC 3’.
6. Write the sequence of an RNA primer that would attach to the DNA strand 5’ AAGAGTC 3’.
Remember which base is not found in RNA.
7. What are two ways that the body repairs DNA that is damaged or copied wrong? What is the
difference between these 2 ways?
8. Name the enzymes that do the following:
a. Unwinds DNA in preparation for replication
b. Creates an RNA primer that attaches to the parent strand of DNA
c. Attaches nucleoside triphosphates to the 3’ end of RNA primers and DNA nucleotides by
breaking off two phosphate groups
d. Removes primers and fills them in with DNA by attaching it to the 3’ end of an Okazaki
fragment
e. Creates bonds between fragments of newly synthesized DNA
f.
Removes large portions of DNA that are damaged by radiation and sun exposure (more
than 1 base pair)
9. Label the following on the diagram below: origin of replication, replication forks, leading
strands, lagging strands, Okazaki fragments, and primers.