Which of the following best describes why ends of linear chromosomes cannot be r

Question

Which of the following best describes why ends of linear chromosomes cannot be replicated comepletely?

A) Telomeres are heterochromatin; therefore, no replication of the telomeres even occurs

B) Nucleotides on the 5' end of a DNA strand (template) cannot be replicated because there is no binding site for a primer, which is required by DNA polymerases

C) The 5' end of a DNA strand (template) cannot be replicated because DNA polymerase cannot add nucleotides on to the 5' end

D) Nucleotides on the 3' end of a DNA strand (template) cannot be replicate becaue there is no binding site for a primer, which is required by DNA polymerases

Explanation / Answer

D) Nucleotide on the 3' end of a DNA strand (temperate) cannot be replicate because there is no binding site for a primer, which is required by DNA polymerase

Let's explain it

In the DNA replication we now that there is formation of two type of strand leading and legging stand . Replication occur 5'-3' (according to new stand and 3'-5' according to old strand ). Leading strand replicate countinous manner and legging in incontinous manner but at the end point there are no lagging stand formation because RNA primase don't add the primer at the at the last necleotide of the DNA chain as a result the are not formation of last lagging stand. Primer are always add on the 3' end of the old DNA strand.

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