(B) The bacterium $Agrobacterium \text{ } tumefaciens$ is a pathogen of several dicot plants. It is able to deliver a piece of $DNA$ known as '$T-DNA$

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(B) The bacterium $Agrobacterium \text{ } tumefaciens$ is a pathogen of several dicot plants. It is able to deliver a piece of $DNA$ known as '$T-DNA$' (Transfer $DNA$) into the host plant cells. This $T-DNA$ integrates into the host genome and transforms normal plant cells into a tumor, which produces the chemicals required by the pathogen. Therefore, $T-DNA$ is the correct answer.

Class 12 Biology Biotechnology: Principles and Processes Tools of recombinant DNA technology

Medium

Which of the following transforms normal plant cells into a tumor?

A
$c-DNA$
B
$T-DNA$
C
$r-DNA$
D
$Mt-DNA$

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Class 12 Questions

Class 12

Biology Questions

Chapter

Biotechnology: Principles and Processes

Subtopic

Tools of recombinant DNA technology

Hind $II$ cuts the $\text{DNA}$ molecule at a particular point by recognizing a specific sequence of how many base pairs?

Easy

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Which of the following enzymes are used to join bits of $DNA$?

Medium

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Match Column-$I$ with Column-$II$ and choose the correct combination from the options given below:

Column-$I$ Column-$II$

$(a)$ Cloning vector $(i)$ Agrobacterium

$(b)$ Ti-$DNA$ $(ii)$ pBR$322$

$(c)$ Disarmed pathogen $(iii)$ $GAATTC$

$(d)$ Recognition sequence $(iv)$ Transformation

Column-$I$	Column-$II$
$(a)$ Cloning vector	$(i)$ Agrobacterium
$(b)$ Ti-$DNA$	$(ii)$ pBR$322$
$(c)$ Disarmed pathogen	$(iii)$ $GAATTC$
$(d)$ Recognition sequence	$(iv)$ Transformation