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A plasmid has genes that confer resistance to both ampicillin and tetracycline. Foreign DNA is inserted at a restriction enzyme recognition site that lies within the ampicillin gene.
-A cell transformed with the resulting recombinant plasmid should be _______ to ampicillin and _______ to tetracycline.
A) resistant; resistant
B) resistant; sensitive
C) resistant; complementary
D) sensitive; resistant
E) sensitive; complementary

Question

Quizplus · Accepted Answer

The insertion of foreign DNA into the ampicillin resistance gene disrupts its function, making the cell sensitive to ampicillin. However, the tetracycline resistance gene remains intact, so the cell remains resistant to tetracycline.

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