Gene Transfer in Plants
The right segment of octopine T-DNA (TR) is necessary for

conjugative transfer
enzymes for agropine biosynthesis
tumour formation
all of these

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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

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

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