A) Haemophilus influenza
B) E. coli
C) Dolly
D) Agrobacterium tumefaciens
Correct Answer: D
Solution :
Agrobacterium tumefaciens is known as natural genetic engineer. It infects broad leaved crops e.g., tomato, soyabean and tobacco and causes tumours called crown galls. The tumour formation is induced by its plasmid-Ti. Which integrates a segment of its DNA called T-DNA into chromosomal DNA of its host plant cells. The T-DNA causes tumours, i.e., gene transfer occurs without human effort.
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