The direction of $DNA$ replication is .........

Who discovered the synthesis of $DNA$ from $RNA$ in Rous sarcoma virus?

During $DNA$ replication,the discontinuously synthesized $DNA$ fragments are joined by .......

Which of the following enzymes is responsible for the synthesis of $DNA$ from $RNA$?

Which of the following processes is related to reverse transcription?

$A$ bacterium containing fully radioactive $DNA$ is allowed to replicate in a non-radioactive medium for two generations. What percentage of bacteria should contain radioactive $DNA$ (in $\%$)?