How many weak hydrogen bonds are present between $A$ (Adenine) and $T$ (Thymine)?

Which of the following nitrogenous bases is not found in $DNA$?

Telomerase is an enzyme which is a

Which organism has a $DNA$ consisting of $4.6 \times 10^6 \, bp$?

$A$ dinucleotide is obtained by joining two nucleotides together by a phosphodiester linkage. Between which carbons of the sugar of the nucleotides are these linkages present?

In $DNA$,$20 \%$ of the bases are adenine. What percentage of bases are pyrimidines (in $\%$)?