Gene Transfer in Plants
Which of the following is true about Agrobacterium tumefaciens?

It causes crown gall disease of plants
All of these
It infects dicotyledonous angiosperms
It infects gymosperms

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Gene Transfer in Plants
Crown gall tissue

both (a) and (b)
can be cultivated in vitro in absence of bacteria
retains tumorous properties when cultivated
shows tumorous properties only in presence of bacteria

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Gene Transfer in Plants
Opines are

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

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Gene Transfer in Plants
In a plant tumour cell

only a small specific segment of callus T DNA is incorporated
may vary from plant to plant
different parts of the Ti-plasmid are incorporated
complete Ti plasmid is incorporated in plant nuclear DNA

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