DNA Structure and Replication
E.coli DNA polymerases II and III lack

partially 5' → 3' exonuclease activity
partially 5' → 3' endonuclease activity
5' → 3' endonuclease activity
5' → 3' exonuclease activity

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

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

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