Recombinant DNA
The piece of equipment, that introduces DNA into cells via DNA-coated microprojectiles is known as

inoculating needle
laser
gene gun
DNA probe

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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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Recombinant DNA
Vectors are

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

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Recombinant DNA
A genomic library is

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

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