Small modifications to these compounds can be produced at mass when they are synthesized on a semiconductor scaffold by the company Twist. A methylene bridge can cause inaccessibility due to ring puckering in the “locked” version of these compounds. DMT is used as a protecting agent in the (10[1])phosphoramidite (10[2]-5[1])(“phosphor-AM-uh-dite”) method (10[1])of synthesizing these compounds. Short samples of these compounds are layered on top of a scaffold to form 3D (10[1])structures (10[1])of them nicknamed “origami.” (10[2])The melting (-5[1])temperature of these compounds (10[1])increases with the number of subunits (-5[1])that can form (-5[1])3 hydrogen bonds instead of 2. (10[1])Each (-5[1])subunit of these compounds consists of a phosphate, a 5-carbon (10[2])sugar, (10[1]-5[1])and either (10[2])a pyrimidine (10[1]-5[1])or (-5[1])purine. (10[3]-5[1])For 10 points, name this class of compounds exemplified (10[1])by DNA (10[1])and RNA. ■END■ (10[7]0[4])