Identify the antibiotic resistance gene from the following options.

Which vector can clone a small fragment of $DNA$?

Two enzymes responsible for restricting the growth of bacteriophages in $E. coli$ were isolated. One was methylase and the other was restriction endonuclease. What is the significance of methylase?

Who received the Nobel Prize for their work on enzymes in the year $1978$?

Which of the following foreign $DNA$ cannot multiply within a host cell?

Identify the plasmid among the following.