... acids: DNA and RNA Multiple Choice Questions 107 RNA is A single-stranded and contains thymine B single-stranded and contains uracil C double-stranded and contains thymine D double-stranded and contais ... Atoms, Ions, and Molecules 47 Fatty acids consist mainly of carbon and hydrogen, and so fatty acids are A nonpolar and not dissolve in water B nonpolar and dissolve in water C polar and not dissolve ... light, and not settle if the solution is left standing C Solutes are greater than 100 nanometers in size, and will settle out of solution if the mixture is left standing D Solutes are between 50 and...