Chemical formula tetranucleotide with one of each of the four nitrogenous bases in the DNA?
When would (A+T)/(G+C) ratio differ the most? Between tRNA, mRNA or rRNA? why?

Question

frostbite · Answer

Just count the atoms for the chemical formula, the only difference is in the nitrogenous base, and think about how many phosphate groups you would need.
The part with the base ratio appears rather funny since RNA uses uracil instead of thymine, making the thymine contribution to the ratio equal to 0.