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Gene Transfer in Plants

Gene Transfer in Plants
The size of the virulent plasmid of Agrobacterium tumefaciens is

>235 kb
40-80 kb
80-120 kb
140-235 kb

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

all of these
tumour formation
enzymes for agropine biosynthesis
conjugative transfer

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Gene Transfer in Plants
Opines that are present in crown gall tumour include

octopine
agropine
all of these
nopaline

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

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

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Gene Transfer in Plants
Integrated nopaline T-DNA occurs as

two segments
three segments
four segments
single segment

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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 D
vir B
vir C
vir A

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