DNA Replication Worksheet
A Grade 9 science worksheet on DNA replication, covering the process, enzymes involved, and key terms.
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DNA Replication Worksheet
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Read each question carefully and answer to the best of your ability. Use complete sentences where appropriate.
1. What is the primary purpose of DNA replication?
To produce proteins
To create RNA molecules
To make an identical copy of DNA
To transport genetic information
2. Which enzyme is responsible for unwinding the DNA double helix during replication?
DNA ligase
DNA polymerase
Helicase
Primase
3. DNA replication is described as because each new DNA molecule consists of one original strand and one newly synthesized strand.
4. The enzyme adds new nucleotides to the growing DNA strand.
5. The short segments of DNA synthesized on the lagging strand are called fragments.
6. DNA replication occurs during the M phase of the cell cycle.
True
False
7. The leading strand is synthesized continuously, while the lagging strand is synthesized discontinuously.
True
False
8. Describe the role of DNA ligase in DNA replication.
9. Explain why DNA replication is considered 'semiconservative'.
10. Label the diagram of the DNA replication fork below with the following terms: Leading strand, Lagging strand, DNA Polymerase, Helicase, Okazaki fragments, Replication fork, New DNA strand, Original DNA strand.
