At which point in the eukaryotic cell cycle does mitosis occur? A. before the G1 phase
B. after the G2 phase
C. following the S phase
D. after the G0 phase

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

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the answer is c.mitochondria. glad to .