Agarose is extracted from which of the following?

Endonuclease . . . . . . .

The restriction enzyme $EcoRI$ cuts $DNA$ at the recognition site $GAATTC$ between which two bases?

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:

$A$ special sequence from where $DNA$ replication starts.

Agarose is a natural polymer extracted from