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BIOD_152_Final_Exa m Correct Answer Replication of DNA begins at a single origin of replication and then proceeds the entire length of the strand, in one direction (T/F) False What enzyme is responsible for relieving the stress associated with the twisting and untwisting of a DNA strand during replication. Topoisomerase As a replicated DNA strand elongates, what enzyme is responsible for adding nucleotides? DNA polymerase The energy required to add a nucleotide to a growing chain is s...