Question

What is cytosol?

Answer 1

The cytosol, by definition, is the fluid in which organelles of the cell reside. This is often confused with cytoplasm, which is the space between the nucleus and the plasma membrane.
The primary component of cytosol is water. Water makes up 70% of a cell and is primarily in the cytosol to dissolve other components. This includes polar molecules and ions, or charged particles. Additionally, this water can be used to assist in chemical reactions within the cell. This will help aid in cellular metabolism.

Proteins and other macromolecules will dissolve in cytosol when not being used.