Normal $E.$ coli cells carry resistance against which of the following antibiotics?

The agarose powder used in agarose gel electrophoresis is extracted from .......... .

$A$ student while extracting $DNA$ from $Aspergillus$ fungus uses . . . . . . enzyme to break open the cell wall.

Select the option that excludes characteristics applicable to plasmids:
$(a)$. Circular $DNA$
$(b)$. Linear $DNA$
$(c)$. Present in all bacteria
$(d)$. Contain essential genes
$(e)$. Extra chromosomal self-replicating

Where is $BamHI$ located in $pBR322$?

Which of the following is related to genetic engineering?