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

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

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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', 4' 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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