Question

With reference to the designing of vectors based on Ti and Ri plasmids, consider the following statements.
a. They are disarmed by removing the genes causing the disease
b. They carry sites for insertion of gene of interest.
c. They carry selectable markers.
Which of the statements given are correct?

• A. $1$ and $2$ only
• B. $2$ and $3$ only
• C. $1$ and $3$ only
• D. $1,2$ and $3$

Answer 1

The correct option is D $1,2$ and $3$

D. 1,2 and 3

Solution : When Ri plasmid and Ti plasmid vectors are designed the disease causing genes are disarmed and only the genes of interest are kept. They carry the gene of interest and also selectable markers like antibiotic resistance.

So the correct answer is " 1,2 and 3"