If a length of $DNA$ has $45,000$ base pairs, how many complete turns will the $DNA$ molecule take?
$4,500$
$45,000$
$45$
$450$
Study the given figure of nucleosome and select the option that correctly identifies the part $A, B$ and $C$ ?
$A\;\;;\;\;B\;\;;\;\;C$
In sea urchin $DNA$, which is double stranded, $17\%$ of the bases were shown to be cytosine.The percentages of the other three basesexpected to be present in this $DNA$ are
Assertion : $DNA$ is associated with proteins.
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.
Adjacent nucleotides in a polynucleotide chain are joined by
Which of the following is correct for Watson and Crick's model of $DNA$. It is duplex with