KINGDOM MONERA

 

Bacteria are unique & diverse, with different roles.

 

I. Prokaryotes vs. Eukaryotes

A. Structural differences: unicellular, small, circular chromosomes, binary fission, no organelle, simple flagella

      B. Metabolic differences

II. Bacterial Structure

A. Cell Wall:  Peptidoglycan, Gram stain, glycocalyx

      B. Morphology

            1. Shape:  bacilli, cocci, spirilla

            2. Flagella, pili, fimbria

III. Bacterial Variation

      A. Mutation

      B. Genetic recombination:  conjugation

IV. Bacterial Ecology & Metabolic diversity

      A. Environments: ubiquitous

      B. Metabolic diversity

            1. obligate/ facultative anaerobes; aerobes

2. autotrophic bacteria:  Photosynthetic & chemoautotrophic

            3. Heterotrophic

            4. Nitrogen-fixing

V. Bacteria as plant pathogens

VI. Bacteria as animal pathogens

      1. Legionnaires’ disease

      2. STDs

      3. Dental caries

VII. Bacterial Diversity

      A. Archaebacteria:  methanogens, halophiles,               thermophiles

      B. cyanobacteria

      C. nitrogen-fixing bacteria

      D. Chemoautotrophic bacteria

 

 

VIRUSES--A Brief Introduction

 

Noncellular infectious agents that have a protein coat surrounding nucleic acid that cannot reproduce by themselves.

 

Bacteriophages

Virus replication

      Lysogeny/ Lysogenic cycle

      Lytic cycle

Diversity among the viruses