BIOL107 Lecture Notes - Lecture 4: Cell Membrane, Organelle, Prokaryote

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL107
• Professor: Warren Gallin

Document Summary

Plasma membrane separates the interior of the cell from the exterior. Outside the plasma membrane is a cell wall that is synthesized by the cell. Cell wall contains the cell, prevents the cell from expanding and rupturing, prevents the cell form being sheared and broken by external mechanical forces. Plasma membrane provides the selective permeability barrier and reaction surface (membrane bound proteins) that is essential for life processes. Nucleoid body is region of concentrated dna, unseparated from the rest of cellular. Cells contain many membrane-bound structures, called organelles. Each organelle has a distinct set of functions that contribute to the overall capabilities of the cell. The organelles co-operate with each other although they are distinct, they often contribute material and precursors to each other. Remember, each membrane has two sides, and processes on the two sides can be different because they are in different, non-connected volumes of cellular matter.