A New DNA Strand Elongates Only in the 5' to 3

question 45

Multiple Choice

A new DNA strand elongates only in the 5' to 3' direction because

• A) DNA polymerase begins adding nucleotides at the 5' end of the template.
• B) Okazaki fragments prevent elongation in the 3' to 5' direction.
• C) the polarity of the DNA molecule prevents addition of nucleotides at the 3' end.
• D) replication must progress toward the replication fork.
• E) DNA polymerase can only add nucleotides to the free 3' end.

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