$A$ $DNA$ molecule containing radioactive thymidine is allowed to replicate in a non-radioactive environment. What will be the exact number of $DNA$ molecules containing radioactive thymidine after three replication cycles?

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 sequences is found in Rous sarcoma virus?

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

On which template strand of $DNA$ is the new strand synthesized discontinuously?

Okazaki segments are formed during