Ten E.coli cells with ${ }^{15} N$ - dsDNA are incubated in medium containing ${ }^{14} N$ nucleotide. After 60 minutes, how many E.coli cells will have DNA totally free from $15\,N$ ?
$40\,cells$
$60\,cells$
$80\,cells$
$20\,cells$
What is the cause of discontinuous synthesis of $DNA$ on one of the parental strands of $DNA$ ? What happens to these short stretches of synthesised $DNA$ ?
Find out the incorrect statement.
E. coli has only $4.6 \times 10^{6}$ base pairs and completes the process of replication within 18 minutes; then the average rate of polymerisation is approximately
Replication of $DNA$ is in
Which one of the following correctly represents the manner of replication of $DNA$ ?