The example gel below shows the bands produced by samples of some of the DNA samples from the earlier questions. Compare the migration patterns tu questions below. Note: Negatively supercoiled DNA migrates slightly faster through agarose gel than positively supercoiled DNA.

$1$b$.$ Lane $1$ could contain $...($select all$)$

Step $4$ DNA $($after removing intercalating agent$)$

Starting DNA $($before intercalating agent$)$

Step $3$ DNA $($after topoisomerase$)$

Step $2$ DNA $($after intercalating agent, before topoisomerase$)$

$3$

Multiple Answer

$1$ point