Which amino acids are present in histones?

What is deoxyribonucleic acid $(DNA)$?

Provide definitions/explanations for the following terms: $Nucleosome$ and $Euchromatin$.

Which sugar is found in $RNA$?

The proposal of the double helix structure of $DNA$ was based on the observations of which of the following scientists?

One of the strands of double stranded $\text{DNA}$ has base composition as follows: $15 \% A, 15 \% T, 40 \% G$ and $30 \% C$. What will be the percentage of these bases in the complementary strand?