Why Does a New DNA Strand Elongate Only in the 5

question 65

Multiple Choice

Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?

• A) DNA polymerase begins adding nucleotides at the 5' end of the template.
• B) The polarity of the DNA molecule prevents addition of nucleotides at the 3' end.
• C) Replication must progress toward the replication fork.
• D) DNA polymerase can add nucleotides only to the free 3' end.

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