Following statements describe the characteristics of the cloning vectors. Identify the incorrect statement.

• A

  The vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes.

• B

  The tumor inducing (Ti) plasmid of Agrobacterium tumifaciens has now been modified into a cloning vector which is no more pathogenic to the plants but is still able to use the mechanisms to deliver genes of our interest.

• C

  Vector pBR322 has restriction sites for Hind III, EcoR I, BamH I, Sal I, Pvu II, Pst I and Cla I

• D

  Origin of replication helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants.