EcoRI is

$A$ plasmid without a selectable marker was chosen as a vector for cloning a gene. How does this affect the experiment?

In vector $\text{pBR-322}$,the $\text{Rop}$ codes for the $:-$

Which of the following is not a basis of difference between chromosomal $DNA$ and plasmid?

To isolate $DNA$ from fungi, the cell wall must be broken down. This process is carried out by which of the following enzymes?

$A$: Restriction enzymes belong to a larger class of enzymes called nucleases.
$R$: Each restriction enzyme recognizes a specific palindromic nucleotide sequence in the $DNA$.