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
$1000$ base pairs/second
$2000$ base pairs/second
$3000$ base pairs/second
$4000$ base pairs/second
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 $15\,N$ ?
Semiconservative replication of $DNA$ was first demonstrated in
$DNA$ replication is aided by
Escherichia coli fully labelled with $15 \mathrm{~N}$ is allowed to grow in $14 \mathrm{~N}$ medium. The two strands of $DNA$ molecule of the first generation bacteria have
Find out the incorrect statement.