DNA and RNA are both made up of monomers called nucleotides. They also both have three nitrogenous bases: Adenine, Cytosine, Guanine.
While stress is a type of pressure given by force acting per unit area. Strain is the ratio of change in length and total length when stress occurs. Ratio of stress and strain gives Young's Modulus. The curve between stress and stress is linear as long as they are proportional to each other.
