Thymine is $........$

Which of the following nitrogenous bases has a double-ring structure?

$A$ distinct mechanism that usually involves a short segment of $DNA$ with remarkable capacity to move from one location in a chromosome to another is called

In the structure of $DNA$,the length of one full turn is $.........$ and the number of nitrogen base pairs is $...........$.

$DNA$ is a

Deoxyadenosine,deoxyguanosine,deoxycytidine,and deoxythymidine are $....................$.