The Ti plasmid has been genetically engineered to improve its utility as a cloning vector by all of the following EXCEPT

A. nonessential regions, including tumor-inducing genes, have been deleted.
B. elements found in other vectors, such as selectable markers and multicloning sites have been added.
C. genes responsible for resisting infection with B. thuringiensis have been added.
D. genes required for the actual infection of the plant cell by the plasmid are retained.


Answer: C

Biology & Microbiology

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