The enzyme $DNA$ polymerase in $E.coli$ is a $DNA$ dependent polymerase and also has the ability to proof-read the $DNA$ strand being synthesised. Explain. Discuss the dual polymerase.
$DNA$ polymerase helps in the replication of $DNA$ molecules. $DNA$ polymerase also helps in the proofreading, if any error/mutation occurred during replication.
At the end of $DNA$ replication $DNA$ molecule having
Given below are two statements :
Statement $I:$
DNA polymerases catalyse polymerisation only in one direction, that is $5^{\prime} \rightarrow 3^{\prime}$
Statement $II:$
During replication of $DNA$, on one strand the replication is continuous while on other strand it is discontinuous.
In the light of the above statements, choose the correct answer from the options given below :
Taylor conducted the experiments to prove semi conservative mode of chromosome replication on
Semiconservative model of $DNA$ replication was proposed by which workers in eukaryotes
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 $15\,N$ ?