EcoRI is

The scientist who first discovered the restriction endonuclease is .......

Cutting of a piece of $DNA$ from a plasmid was done with the help of $...A...$ enzymes,popularly known as $...B....$ Here $A$ and $B$ can be

About gene gun method:
$I.$ This method is also known as biolistic technique.
$II.$ In this method,cells are bombarded with high-velocity micro-particles of gold or tungsten coated with $DNA$ in plants.
$III.$ Important crop plants like maize,rice,and wheat have now been transformed by this method.
Which of the statements given above are correct?

In plants,the tumour inducing plasmid $(Ti)$ of $Agrobacterium$ $tumefaciens$ is used as a cloning vector. This statement is

Manipulation of $DNA$ in genetic engineering became possible due to the discovery of