Which of the following bases are present both in $DNA$ and $RNA$?

Adenine base is present in which of the following?

Thymine is

In the $DNA$ of $E. coli$,the mole ratio of adenine to cytosine is $0.7$. If the number of moles of adenine in the $DNA$ is $350000$,the number of moles of guanine is equal to:

Which of the following statements is incorrect regarding the structure of nucleic acids?

In the double-strand helix structure of $DNA,$ thymine forms hydrogen bonds with