DNA Structure and Replication
The role of primase is to

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

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

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

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DNA Structure and Replication
In DNA, nucleotides are covalently joined together by

3', 4' phosphodiester bonds to form a repetitive sugar-phosphate chain
2', 5' phosphodiester bonds to form a repetitive sugar-phosphate chain
3', 5' phosphodiester bonds to form a repetitive sugar-phosphate chain
2', 3' phosphodiester bonds to form a repetitive sugar-phosphate chain

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