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DNA Structure and Replication

DNA Structure and Replication
Which of these drugs bind to DNA and cuts it, producing hydroxyl radicals?

Tunicamycin
Bleomycin
All of these
Erythromycin

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DNA Structure and Replication
Okazaki fragments occur on the __________ and are bonded together by __________

tRNA, polymerase
Leading strand, polymerase
Lagging strand, ligase
mRNA, anticodons

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DNA Structure and Replication
What does ligase do during replication of DNA?

Digests mRNA when it is no longer needed
Synthesizes the lagging strand
Makes copies of mRNA from DNA
Joins nicks in DNA strands

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DNA Structure and Replication
The packing ratio of nucleosomes is about

9
6
7
8

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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' exonuclease
All of these
5' → 3' polymerase

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DNA Structure and Replication
The nucleosome consists of histone

tetramer and 146 bp of DNA
octamer and 146 bp of DNA
hexamer and 146 bp of DNA
None of these

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