Recombinant DNA
An animal, that has gained new genetic information from the acquisition of foreign DNA, is considered as

an enzyme that links DNA molecules
a transgenic animal
a vector
a chimera

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

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