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?

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

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

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

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