$Taq$ polymerase is isolated from a

What is the enzyme that cuts $DNA$ molecules into fragments called?

What is the specific recognition sequence of a restriction enzyme called?

Polymerase chain reaction employs

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

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