Recombinant DNA
For gene probes to be useful they must

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

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Recombinant DNA
A genomic library is

a collection of many clones possessing different DNA fragments from the same organisms bound to vectors
a place where the information of the genetic organization of organisms are kept.
a book that describes how to isolate DNA from a particular organism
a database where the sequence of an organism's genome is stored

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

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Recombinant DNA
Vectors are

molecules that protect host cells from invasion by foreign DNA
molecules that are able to covalently bond to and carry foreign DNA into cells
molecules that help in replication
molecules that degrade nucleic acids

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