The carriers of hereditary material are

$DNA$ is methylated at

If the $DNA$ of $E. coli$ is $1.36 \ mm$ long,how many base pairs $(bp)$ does it contain?

$A$ $DNA$ fragment contains $3.2$ kilobases $(kb)$. If the $DNA$ fragment contains $820$ adenine molecules,calculate the number of cytosine molecules.

Which molecule is removed when an adenine nitrogenous base attaches to the first carbon of a ribose pentose sugar?

Which one of the following is the genetic material of bacteriophage $\phi X 174$?