01_lecture - Chapter1 TheEvolutionofMicroorganisms

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style  9/22/11  Copyright © The  Chapter 1  The Evolution of Microorganisms  and Microbiology 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 9/22/11  Copyright © The  most populous and diverse group of  organisms found everywhere on the planet  play a major role in recycling essential  elements  source of nutrients and some carry out  photosynthesis benefit society by their production of food,  2 The Importance of 
Background image of page 2
 9/22/11  Copyright © The  organisms and acellular entities too small to be  clearly seen by the unaided eye  some < 1 mm, some macroscopic these organisms are relatively simple in their  construction and lack highly differentiated cells  and distinct tissues 3 Members of the Microbial World
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 9/22/11  Copyright © The  Figure 1.1 4
Background image of page 4
 9/22/11  Copyright © The  prokaryotic cells lack a true membrane- delimited nucleus  This is not absolute  eukaryotic cells have a membrane-enclosed  nucleus, are more complex morphologically,  and are usually larger than prokaryotic cells 5 Type of Microbial Cells
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 9/22/11  Copyright © The  6
Background image of page 6
 9/22/11  Copyright © The  Three domain system, based on a comparison of  ribosomal RNA, divides microorganisms into  Bacteria  (true bacteria) ,   Archaea   Eukarya (eukaryotes) 7 Classification Schemes 
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 9/22/11  Copyright © The  Usually single-celled  Majority have cell wall with peptidoglycan Most lack a membrane-bound nucleus Ubiquitous and some live in extreme  environments Cyanobacteria produce significant amounts of  oxygen 8 Domain  Bacteria
Background image of page 8
 9/22/11  Copyright © The  Distinguished from  Bacteria  by unique rRNA  sequences Lack peptidoglycan in cell walls Have unique membrane lipids Some have unusual metabolic characteristics  Many live in extreme environments 9 Domain  Archaea
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 9/22/11  Copyright © The  Protists – generally larger than  Bacteria  and  Archaea algae – photosynthetic  protozoa – may be motile, “hunters, grazers” slime molds – two life cycle stages  water molds – devastating disease in plants   Fungi  yeast - unicellular 10 Domain  Eukarya - E ukaryotic
Background image of page 10
 9/22/11  Copyright © The  Viruses smallest of all microbes requires host cell to replicate cause range of diseases, some cancers Viroids and virusoids infectious agents composed of RNA 11 Acellular Infectious Agents
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 Copyright © The  Original molecule must have fulfilled protein  and hereditary function Ribozymes  RNA molecules that form peptide bonds perform cellular work and replication 
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/22/2011 for the course BIO 326R taught by Professor Whiteley during the Spring '08 term at University of Texas at Austin.

Page1 / 43

01_lecture - Chapter1 TheEvolutionofMicroorganisms

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online