Which of the following processes is related to reverse transcription?

During the polymerization of deoxyribonucleoside triphosphates in bacteria,which of the following enzymes is mainly required?

$A$ $N^{15}-N^{15}$ $\text{DNA}$ molecule is continuously replicated in $N^{14}$ medium,then what is the percentage of heavy $\text{DNA}$ in the $4^{\text{th}}$ generation (in $\%$)?

Who proposed the semi-conservative replication of $DNA$?

Which of the following is $NOT$ directly involved in the synthesis of a $DNA$ strand?

$A$ $DNA$ molecule in which both strands have radioactive thymidine is allowed to duplicate in an environment containing non-radioactive thymidine. What will be the correct number of $DNA$ molecules that contain some radioactive thymidine after three duplications?