Vectors Uses for Animal Cell Culture
Which one of the following is true about Yeast Episomal plasmids (YEp) vectors?

Carries autonomously replicating sequence
Allows transformation by using crossing over
Has a origin of replication and rep genes
Carries centromere and telomere sequences

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Vectors Uses for Animal Cell Culture
Retroviruses have advantage for being used as vector for animal cells because

viral gene expression is driven by strong promoters
infection does not lead to cell death, infected cells produce virus over an indefinite period
All of these
they cover a wide host range

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