BIOL 1001 Chapter : CH 5 Student Outline
Document Summary
Similarities between bacteria and archaea: both are prokaryotic, both contain single-celled organism, both have small sized organisms (0. 2 - 10 m) Differences between bacteria and archaea: structural and biochemical features, differences in cell walls, plasma membrane composition, ribosomes, and. Classifying prokaryotes is difficult: prokaryotes are structurally simple, no easily observed anatomical or developmental differences, features used in prokaryotic classification: 3 common shapes: spherical (cocci, rod-shaped (bacilli, corkscrew shape (spirilli) Means of locomotion: flagella, found singly, in pairs, at different locations, see the wheel and axle arrangement of prokaryotic flagellum. Bacterial films: biofilms: polysaccharide or protein cell walls of some bacteria are sticky, embedded biofilm bacteria are protected from disinfectants and antibiotics, aggregates (communities) of slime-secreting bacteria are called biofilms. Bacterial endospores: endospores form inside some bacteria under extreme environmental conditions, endospores are thickly-wrapped particles of genetic material and a few enzymes, endospores are resistant to extremes.
