BIOLOGY 1404 EXAM CHAPTER 4-7 REVIEW.

BIOLOGY 1404 EXAM CHAPTER 4-7 REVIEW. CH4 - Cell structure CH5 - Structure and function of plasma membranes CH6 - Metabolism CH7 - Cellular respiration CH4: Cell structure 4.1 A cell is the smallest unit of living things Levels of organization (simplest to complex): cells, tissues, organ, organ system, organism Cells are split into 2 categories: prokaryotic and eukaryotic Bacteria and archaea are PROKARYOTIC Both animal and plant cells are EUKARYOTIC All cells have 1) Cell membrane 2) DNA 3) Cytoplasm Light microscope: Study and examine stained or living cells Electron microscope: Used to study detailed structure of a cell that cannot be easily seen Cell theory states: 1) Living things are composed of one or more cells 2) Cell is the basic unit of life 3) All cells are produced from other cells.