During $DNA$ replication, the strands separate by
$DNA$ polymerase
Unwindase
Gyrase
Topoisomerase
The genes, which are confined to differential region of $Y$ chromosome only, are called
The exchange of one part of a chromosome to the other part of same or another chromosome is called
In protein synthesis, which of the following are required for the synthesis of charged $tRNA$?
Satellite $DNA$ is present in
Which one of the following correctly represents the manner of replication of $DNA$