Not exact matches
Many of Rick Pierson's comments are correct, in particular his identification of what scientists call the water problem: the fact that the reaction of a phosphate with
ribose and nucleobases to form a
nucleotide is energetically uphill in water.
Also, RNA
nucleotides contain
ribose sugars while DNA contains deoxyribose and RNA uses predominantly uracil instead of thymine present in DNA.
More importantly, chemists have now found solid potential chemical pathways for the synthesis of life's basic building blocks;
nucleotides,
ribose, amino acids and lipids.
The product of this pathway is
ribose - 5 - phosphate, which in turn is converted to 5 - phosphoribosyl -1-pyrophosphate (PRPP), the primary driver in the synthesis and salvage of purine
nucleotides.
D -
ribose is a structural component of DNA, RNA, ATP, GTP, flavins (FAD, riboflavin) and other important
nucleotides found in all living cells.