In which year were the two enzymes responsible for restricting the growth of bacteriophage in $E. coli$ isolated?

Which one is a true statement regarding $DNA$ polymerase used in $PCR$?

Biolistics method is suitable for gene transfer into . . . . . .

Discuss with your teacher and find out how to distinguish between (Any two):
$(a)$ Plasmid $DNA$ and Chromosomal $DNA$
$(b)$ $RNA$ and $DNA$
$(c)$ Exonuclease and Endonuclease

Select the appropriate option regarding $r-DNA$.

The first restriction endonuclease type $II$,$...A..$,was isolated by Smith,Wilcox and Kelley from $...B...$ bacterium. It was found to cut $DNA$ molecules at a particular point by recognizing a specific sequence of six base pairs,known as the $...C....$. Here $A, B$ and $C$ can be: