Multiple choice

The problem of replicating the lagging strand (adding bases 3' → 5' direction) is solved by

  1. base pairing

  2. Okazaki fragments

  3. replication forks

  4. helicase (the unwinding enzyme)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Because DNA polymerase can only synthesize in the 5' to 3' direction, the lagging strand must be synthesized in short, discontinuous segments called Okazaki fragments.

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