$A$ genome is the

Which of the following are pyrimidines?

$DNA$ differs from $RNA$ because:

If a double-stranded $DNA$ has $30 \%$ adenine,what is the percentage of cytosine in the same $DNA$ (in $\%$)?

$t-RNA$ is also known as?

$A$ 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?