DNA Sequencing, Mutation and Repair
A nonsense mutation may result into

modification of mRNA
an abnormal elongation of a polypeptide
a premature termination of the synthesis of a polypeptide
a large deletion within the reading frame of a gene

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

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

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DNA Sequencing, Mutation and Repair
A mutagen is defined as

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

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