SAT Biology Subject Test Practice Questions

Answer: E, DNA polymerase. DNA polymerase is the enzyme that catalyzes the linking of DNA building blocks into the DNA strand.

Key Takeaway: DNA polymerase is the only choice that has DNA as part of the name, making it the likely correct choice. During replication, DNA polymerase “reads” the DNA template and uses it to create a duplicate strand. Some DNA polymerases also have proofreading capabilities.