Microbiology

Prokaryotic Profiles: The Bacteria and Archaea

Microbiology: A Systems Approach

Prokaryotic Profiles: The Bacteria and Archaea

Chapter 4

To run the animations you must be in Slideshow View. Use the buttons on the animation to play, pause, and turn audio/text on or off. Please note: once you have used any of the animation functions (such as Play or Pause), you must first click in the white background before you advance the next slide.

Copyright © The McGraw-Hill Companies, Inc) Permission required for reproduction or display.

Types of Microbes

Cellular Prokaryotes

(a) Cell Types Prokaryotic Chromosome Ribosomes Nucleic acid AIDS virus Eukaryotic Ribosomes NucleusMitochondria

Acellular Eukaryotes Viruses

(b) VirusTypes Envelope Capsid

Flagellum

Cellwall Cell membrane

Flagellum

Cell membrane

Bacterial virus

Bacteria and archaea

Fungi,protozoa, helminths

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Viruses and bacteriophage

Size DOES Matter

Prokaryote Dimensions Surface Area Volume Surface-tovolume ratio 1 µm 6 µm2 1 µm3 6 µm-1 Eukaryote 30 µm 5,400 µm2 27,000 µm3 0.2 µm-1 Comparison 30X smaller 900X smaller 27,000X smaller 30X LARGER

• Assuming cubic cell shape • This affects transport and metabolism

Chapter 4, pages 80 to 107

1

Prokaryotic Profiles: The Bacteria and Archaea

Microbiology: A Systems Approach

4.1 Prokaryotic Form and Function

Structures common to all bacterial cells

• Cell membrane • Cytoplasm • Ribosomes • One (or a few) chromosomes

Structures found in most bacterial cells

• Cell wall • Surface coating or glycocalyx

Chapter 4, pages 80 to 107

2

Prokaryotic Profiles: The Bacteria and Archaea

Microbiology: A Systems Approach

Structures found in some bacterial cells

• Flagella • Pili • Fimbriae • Capsules • Slime layers • Inclusions • Actin cytoskeleton • Endospores

Prokaryote Cell

4.2 External Structures

•...