Sample Biology Paper on Jess fluid

Biological membranes are semipermeable membrane within the cell-protecting the cytoplasm and nucleoplasm from external contact. Most of the membranes have a phospholipid bilayer, which allows for the organelle’s functioning and the exchange of substances between the organelle and the external environment (Tortora, 1987). The fluid is formed through transport activities within the cell. The exchange of substances within the cell through diffusion results in the fluidity of the cell. The phospholipid bilayer structure maintains the fluidity of the cell. The fluidity is affected by the surrounding temperature and the length of fatty chains. The fluidity of the membrane is determined by the cells’ arrangement, with fluidity increasing in loosely arranged cells (Tortora, 1987).

There are two separate cells for the case provided, one having long lipids with nonpolar tails and no double bond. The other section has both long and short nonpolar lipids, with some of the long tails having double bonds. The membrane’s nonpolar characteristic is due to the replacement of a fatty acid group in the membrane. Typically, phospholipids are characterized by a non-covalent bond. For the membrane provided, the second membrane has double bonds allowing for easy movement of the fluid within the cell. Therefore, the second membrane is referred to as Jess fluid since it contains both short and long nonpolar tails with a double covalent bond.




Tortora, G. (1987). Principles of Anatomy and Physiology. New York: Harper and Row.