Which enzyme is known as molecular scissors?

Select the correct option regarding $Taq$ polymerase.

Which of the following enzyme$(s)$ are $\text{NOT}$ essential for gene cloning?
$A.$ Restriction enzymes
$B.$ $\text{DNA}$ ligase
$C.$ $\text{DNA}$ mutase
$D.$ $\text{DNA}$ recombinase
$E.$ $\text{DNA}$ polymerase
Choose the correct answer from the options given below:

Describe the role of Agrobacterium tumefaciens in transforming a plant cell.

Plasmids are found in

Identify true or false:
$(i)$ Restriction site is always a palindromic sequence.
$(ii)$ Palindromic sequence is always a restriction site.