For the strand separation and stabilisation during $DNA$ replication which of the following set of enzymes and proteins are required?
$SSBP$, gyrase, primase
Topoisomerase, helicase, ligase
Gyrase, ligase, primase
Topoisomerase, helicase, $SSBP$
Which of the following group of codons is called stop codons ?
A normal metaphase chromosome with a midial centromere is
Which one of the following ratio is constant in $DNAs$ of different species