AIIMS 2019 Zoology Ti-plasmid MCQ Question

In Ti-plasmid, the virulence (Vir) genes are removed to create a non-pathogenic strain used in genetic engineering, allowing for the safe transfer of desired genes into plant cells. Option A is incorrect because the auxin gene is retained to promote plant growth, while option C is incorrect as the cytokinin gene is also retained to support cell division. Option D is incorrect since both auxin and cytokinin genes are preserved to facilitate the regeneration of transformed plants.