Gene Transfer in Plants
Which of the following is not true about the helper plasmids?

These help in the mediating conjugation of intermediate vectors
These can't replicate in Agrobacterium
These can replicate in Agrobacterium
All of these

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

Integration of T DNA occurs at one site that may be random in the plant nuclear 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 only at one specific sites in the plant nuclear DNA

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Gene Transfer in Plants
Crown gall tissue

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

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