Chapter 3 The Prokaryotes
Chapter 3 The Prokaryotes
Chapter Outline 3.1 Bacteria 3.2 Actinomycetes 3.3 Cyanobacteria 3.4 Archaeobacteria 3.5 Other prokaryotes 3.6 Classification of bacteria
Chapter Outline 3.1 Bacteria 3.2 Actinomycetes 3.3 Cyanobacteria 3.4 Archaeobacteria 3.5 Other prokaryotes 3.6 Classification of bacteria
Concepts Microorganisms are too small to be seen without the use of a microscope.The techniques-such as sterilization and the use of culture medium are required to isolate and grow these microbes. Bacteria may be spherical (cocci),rod-shaped (bacilli),spiral,or filamentous. Most bacteria can be divided into gram-positive and gram- negative groups based on their cell wall structure and response to the Gram stain.Bacteria such as mycoplasmas lack a cell wall
Concepts • Microorganisms are too small to be seen without the use of a microscope. The techniques-such as sterilization and the use of culture medium are required to isolate and grow these microbes. • Bacteria may be spherical (cocci), rod-shaped (bacilli), spiral, or filamentous. • Most bacteria can be divided into gram-positive and gramnegative groups based on their cell wall structure and response to the Gram stain. Bacteria such as mycoplasmas lack a cell wall
3.1 Bacteria Size,Shape,and Arrangement of Bacterial Cells Most bacteria fall within a range Cm=10-2meter from 0.2 to 2.0 um in diameter mm =10-3meter μm=10-6 meter and from 2 to Sum in length. nm=10-9meter They have a few basic shapes-spherical coccus (plural,cocci,meaning berries),rod-shaped bacillus (plural,bacilli,meaning little staffs),and spiral
Size, Shape, and Arrangement of Bacterial Cells They have a few basic shapes-spherical coccus (plural, cocci, meaning berries), rod-shaped bacillus (plural, bacilli, meaning little staffs), and spiral. Cm = 10-2 meter mm = 10-3 meter μm = 10-6 meter nm = 10-9 meter 3.1 Bacteria Most bacteria fall within a range from 0.2 to 2.0 μm in diameter and from 2 to 8μm in length
Representative Cell Shapes(Morphology)in Prokaryotes Budding and appendaged bacteria