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 :
$(a)$ Euchromatin is loosely packed chromatin
$(b)$ Heterochromatin is transcriptionally active
$(c)$ Histone octomer is wrapped by negatively charged DNA in nucleosome
$(d)$ Histones are rich in lysine and arginine
$(e)$ A typical nucleosome contains $400\,bp$ of DNA helix
Choose the correct answer from the options given below:
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.