Complex sentence: In terms of structure, the difference between Morpholinos and DNA is that, while Morpholinos have standard nucleic acid bases, those bases are bound to morpholine rings instead of deoxyribose rings and linked through phosphorodiamidate groups instead of phosphates.
Split into simpler sentences: In terms of structure, the difference between Morpholinos and DNA is that, while Morpholinos have standard nucleic acid bases. Those bases are bound to morpholine rings linked through phosphorodiamidate groups instead of phosphates.