DNA Structure and Replication
Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

3' → 5' exonuclease
5' → 3' polymerase
5' → 3' exonuclease
All of these

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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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