In $DNA$ replication,in which direction does the synthesis of the new strand occur?

Okazaki fragments are observed in which of the following processes?

$15 \,N$ labeled $Escherichia \,coli$ is allowed to grow in a $14 \,N$ medium. The two strands of the $DNA$ molecule of the first generation bacteria have:

Bacteria were grown in a medium containing a heavy isotope of nitrogen $(^{15}N)$ for many generations,and all their $DNA$ contained only heavy nitrogen. $A$ bacterium of this type was transferred to a normal medium and allowed to duplicate. After two divisions,the distribution of heavy $DNA$ is likely to be:

Which of the following uses $RNA$ as a template for $DNA$ synthesis?

Which of the following statements is correct about $DNA$ polymerase?