Gene Transfer in Plants
Virulence trait of Agrobacterium tumefaciens is borne on

tumour inducing plasmid DNA
both chromosomal and plasmid DNA
cryptic plasmid DNA
chromosomal DNA

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Gene Transfer in Plants
Which of the following is true about T DNA?

Integration of T DNA occurs at two specific sites in the plant nuclear DNA
Integration of T DNA can occur at many different, apparently random, sites in the plant nuclear DNA
Integration of T DNA occurs at one site that may be random in the plant nuclear DNA
Integration of T DNA occurs only at one specific sites in the plant nuclear DNA

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Gene Transfer in Plants
Virulent strains of Agrobacterium contain large Ti-plasmids, which are responsible for the DNA transfer and subsequent disease symptoms. It has been shown that Ti-plasmids contain

one set of sequence necessary for gene transfer
two sets of sequence necessary for gene transfer
four sets of sequence necessary for gene transfer
three sets of sequence necessary for gene transfer

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