Which of the following is known as soluble $RNA$ $(sRNA)$?

What would happen if histones were to be mutated and made rich in acidic amino acids such as aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?

In a $DNA$ molecule,the purine and pyrimidine bases of complementary strands are linked together by:

The bond between the phosphate and hydroxyl group of sugar is ...........

$mRNA$ is a polymer of

Give differences between $DNA$ and $RNA$.