Gene Transfer in Plants
Advantage of microprojectile method over microinjection method for gene transfer in plants include

gene can be transferred to many cells simultaneously
intact cells are used
method is universal in its application irrespective of all shape, size, type and presence or absence of cell wall
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

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

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Gene Transfer in Plants
Opines are

amino acid derivatives found in tumor tissues
amino acid derivatives found in both normal as well as tumor tissues
None of these
amino acid derivatives found in normal tissues

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