Lipid.
If you are meaning how does an insoluble compound differ from a soluble compound, an insoluble compound does not dissolve in a given solvent, usually water, and a soluble compound does dissolve.
Lipids are insoluble in water and found in biological membranes.
ozone
ozone
Yes, it is insoluble in water
Both lipids and sugars are impotent to membranes. Membranes are composed of phospholipids. They also contain glycoproteins, proteins that use sugars to help in communication between cells and identification.
Starch
You think probable to a precipitate, an insoluble compound.
A compound can be insoluble or not; but not the cation. You think probable, for example, to silver halogenides.
No, it is an insoluble compound.
AgCl
An ionic compound will precipitate out of solution if it is insoluble in water.