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← ScienceWhich outcome occurs when a polymerase encounters significant DNA hairpin formation?
A)Polymerase stalling before the hairpin✓
B)Increased DNA replication fork velocity
C)Decreased replication error possibilities
D)Increased processivity past hairpin location
💡 Explanation
Polymerase pauses occur, because steric hindrance from the three-dimensional shape created by the hairpin obstructs the active site, disrupting base pairing function and elongation kinetics. Pausing occurs rather than continuing at increased processesivity, therefore transcription terminates prior to the hairpin region.
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