STD 12 - 11. organisms and populations — BIOLOGY STD 12 Science — Question

$I.$ DNA being a hydrophilic molecule cannot pass through cell membranes

$II.$ Agrobacteriumtumefaciens delivers a piece of $DNA$ known as $'Z-DNA'$ in the Tiplasmid 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

$I. X-ray$ film

$II.$ Electrophoresis

$III.$ Digestion with restriction enzyme

$IV.$ Ethidium bromide

$V.$ Radioactive probe

Choose the option having correct sequential order of these events