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Gene Transfer in Plants

Gene Transfer in Plants
The transfer of intermediate vectors into Agrobacterium are brought about by

transformation
biparental mating
transduction
triparental mating

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

tumour formation
conjugative transfer
all of these
enzymes for agropine biosynthesis

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Gene Transfer in Plants
Integrated octopine T DNA occurs as

two segments
single segment
four segments
three segments

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Gene Transfer in Plants
In response to the activating signal molecule, an endonuclease is produced that causes nicks in the T-DNA. It is encoded by

vir B
vir D
vir C
vir A

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Gene Transfer in Plants
On Ti-plasmid T-region or T-DNA is flanked by a direct repeat of

12 bp
30 bp
20 bp
25 bp

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Gene Transfer in Plants
Which of the following is not true about the direct repeats flanking T-DNA?

All of these
These are important in integration mechanism
These repeats are transferred intact to the plant genome
They are conserved between nopaline and octopine Ti-plasmids

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