Which enzyme is responsible for linking the fragments of $DNA$?

$DNA$ polymerase links nucleotides by forming which type of bond?

On which plant did Taylor and his colleagues perform experiments using radioactive thymidine to prove the semi-conservative mode of $DNA$ replication?

$DNA$ replication in bacteria occurs

$^{15}N$ labeled $E. coli$ is allowed to grow in a $^{14}N$ medium. The two strands of the $DNA$ molecule of the first generation bacteria have:

New strand on a $DNA$ template is initiated by