Recombinant DNA
In genetic engineering, a chimera is

a plasmid that contains foreign DNA
a virus that infects bacteria
a fungi
an enzyme that links DNA molecules

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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
The Southern blotting technique depends on

similarities between the sequences of probe protein and experimental protein
the molecular mass of proteins
similarities between the sequences of probe RNA and experimental RNA
similarities between the sequences of probe DNA and experimental DNA

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Recombinant DNA
Vectors are

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

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Recombinant DNA
Bacterial cells protect their own DNA from degradation by restriction endonucleases by

deleting all recognition sites from the genome
having anti restriction endonucleases
not producing any restriction endonucleases
methylating the DNA at the sites that the enzyme recognizes

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