The $A/U$ and $G/U$ ratio in $RNA$ is
$\ne 0$
$= T / A \ Ratio$
$= A / T\ Ratio$
None of these
The reason for double helical structure of $DNA$ is operation of
Assertion : $DNA$ is associated with proteins.
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.
In a given $DNA$ segment the number of nucleotides of guanine is $75$ and those of thymine is $75$. The total number of nucleotides in the segment will be
$NHC$ structural proteins are
Uridine is formed when pyrimidine nitrogen base uracil joins with