Agarose is a natural polymer extracted from

Which of the following statements is not correct regarding the $Eco RI$ restriction endonuclease enzyme?
$I.$ $Eco RI$ restriction endonuclease enzyme is isolated from $Escherichia \; coli \; RY13$.
$II.$ Its recognition sequence is $5^{\prime}-GAATTC-3^{\prime}$ / $3^{\prime}-CTTAAG-5^{\prime}$.
$III.$ Its site of cleavage is between $G$ and $A$ in the sequence $5^{\prime}-GAATTC-3^{\prime}$.

The first restriction endonuclease was isolated from which of the following?

Restriction endonucleases are isolated from some bacteria. Their role in bacteria is

Select the correct option regarding $Taq$ polymerase.

Common bacteria used in genetic engineering is