By which of the following means are the nucleosides linked to one another in RNA and DNA molecules?
A) They are linked together by alpha-glycosidic bonds.
B) They are linked together by beta-glycosidic bonds.
C) They are linked together by 5' phosphodiester bridges.
D) They are linked together by 2',5' phosphodiester bridges.
E) None of the other answers is correct.

Question

Quizplus · Accepted Answer

Nucleosides in RNA and DNA are linked together by 5' phosphodiester bridges, which connect the 5' phosphate group of one nucleotide to the 3' hydroxyl group of the next nucleotide. This creates a linear, polymer backbone for the nucleic acid molecule. Alpha- and beta-glycosidic bonds refer to the linkage between the sugar and nitrogenous base components of the nucleoside, not the linkage between nucleosides in the polymer chain. 2',5' phosphodiester bridges are not found in RNA or DNA, but are instead found in other types of nucleic acids.

By Which of the Following Means Are the Nucleosides Linked