The most important negative ion in intracellular fluid is

Question

Quizplus · Accepted Answer

Phosphate ions and protein molecules are the most important negative ions in intracellular fluid. Phosphate ions are important for energy storage (as ATP), cell signaling, and DNA/RNA synthesis. Protein molecules are essential for the structure and function of cells, as well as for enzymatic reactions. Chlorine is more abundant in extracellular fluid than intracellular fluid. Therefore, both options A and B are correct, making D the best choice.

The Most Important Negative Ion in Intracellular Fluid Is