DNA Structure and Replication
The role of primase is to

synthesize an RNA primer to begin the elongation process
dismantle RNA primer
cleave and unwinds short sections of DNA ahead of the replication fork
proofread base pairing

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DNA Structure and Replication
The B-DNA structure found in solution is a

left-handed zig-zag helix of antiparallel chains (10 bp/turn)
right-handed double helix of antiparallel chains (∼10 bp/turn)
right-handed double helix of parallel chains (∼10 bp/turn)
left-handed double helix of antiparallel chains (10 bp/turn)

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