Which substance is important to the structure of the plasma membrane because it helps the membrane to keep its shape and fluid qualities?

Phospholipids

Explanation:

Phospholipids are arranged in a bilayer. This makes up the basic fabric of the plasma membrane.

this process is called "phosphorylation." a phosphate bond joins adenosine diphosphate to form adenosine triphosphate.

cell division is not regulated in tumor cells.