Vector for T-DNA is

What is the capacity of a cosmid vector for a DNA insert?

The widely used vector DNAs in plants are isolated from

The vectors are DNA molecules that can carry a foregin DNA segment and replicate inside the host cell. One amongst the following is not used as a vector in recombiant technology :

Assertion : If a piece of DNA to be propagated during recombinant DNA procedures requires a vector. Reason : Vector provides ori.

Which enzyme helps to join vector DNA and derived DNA fragment ?

To prevent recirculation of vector DNA and to increase the frequency of production of recombinant DNA technology