Recombinant DNA
For gene probes to be useful they must

be labeled in some manner to allow detection
None of these
be large enough to contain gene-specific sequences
both (a) and (b)

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Recombinant DNA
The advantage of using DNA polymerases from thermophilic organisms in PCR is that

the DNA polymerases of these bacteria never make mistakes while replicating DNA
the DNA polymerases of these bacteria can withstand the high temperatures needed to denature the DNA strands
the DNA polymerases of these bacteria are much faster than those from other organisms
All of these

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