DNA Sequencing, Mutation and Repair
A mutagen is defined as

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

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DNA Sequencing, Mutation and Repair
The DNA sequences of rRNA genes can be used to

predict whether a bacteria will be gram-positive or gram-negative
assess relatedness of eukaryotes but not prokaryotes
predict the pulsed field gel pattern of a microorganism
obtain a tentative identification of a new microorganism

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