Nucleoside triphosphates exist in a cell as complexes with A) Phosphate ion. B) Mg²⁺only. C) Mn²⁺only. D) Mg²⁺and sometimes Mn²⁺. E) All of the above

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Nucleoside triphosphates, such as ATP, typically form complexes with Mg²⁺ ions in cells, which stabilize the triphosphate group. Mn²⁺ can also form complexes, but it is less common.

Nucleoside Triphosphates Exist in a Cell as Complexes with