Which of the following statement is not true? I. DNA being a hydrophilic molecule cannot pass through cell membranes II. $Agrobacterium{\rm{ }}tumefaciens$ delivers a piece of DNA known as ‘Z-DNA’ in the Ti-plasmid which transforms normal plant cells into tumour cells to produce chemical against pathogens III. Retrovirus, adenovirus, papillomavirus are also now used as cloning vectors in animal because of their ability to transform normal cells into cancerous cell. IV. In genetic engineering, DNA from different sources are cut with the same restriction enzymes so that both DNA fragments have same kind of sticky ends Choose the correct option