DNA Sequencing, Mutation and Repair
The whole-genome shotgun sequencing approach depends primarily on

sequencing the bacterial chromosome while it is still intact
rapidly sequencing thousands of small randomly cloned fragments
methodical sequencing a few large cloned fragments of DNA
All of these

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DNA Sequencing, Mutation and Repair
Due to which of the following DNA repair mechanisms, one is able to distinguish newly synthesized DNA strands from older one?

Old strands are methylated while new strands are not
New strands are lower in molecular size
New strands do not contain cytosine bases
New strands are methylated while old strands are not

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DNA Sequencing, Mutation and Repair
A mutagen is defined as

a chemical or physical agent that induces mutations
an inhibitor of gene modification
an enzyme that repairs mutations
a molecule which stabilizes DNA thus prevents mutations from occurring

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