9 03, 2021

Aerobic and Anaerobic Growth and Metabolism

Microbiological Metabolism|0 Comments

The growth of most medically important organisms is enhanced by the presence of oxygen, which acts as the hydrogen acceptor in the final stages of [...]

9 03, 2021

Bacterial Metabolism

Microbiological Metabolism|0 Comments

Bacteria cannot reproduce without a source of energy and the building blocks of cellular constituents (e.g. amino acids, carbohydrates, lipids). Minimum requirements for growth are [...]

9 03, 2021

Growth Cycle in Microbiology

Microbiological Metabolism|0 Comments

Growth Cycle Bacteria reproduce by binary fission:  one cell divides to form 2 progeny cells.  This results in exponential (logarithmic) growth. 1. Number of cells     [...]

9 03, 2021

Metabolism in Microbiology

Microbiological Metabolism|0 Comments

Learning Objectives: You should be able to: explain how bacteria reproduce and the potential effects of a short vs. a long generation time on the [...]

8 03, 2021

Specialized Structures Outside of the Cell Wall

Bacterial Classification and Structure|0 Comments

Capsule Gelatinous layer surrounding the bacterial cell; gives many bacterial colonies a mucoid appearance. Composed of polysaccharide (except in Bacillus anthracis) which varies among bacteria [...]

8 03, 2021

Cytoplasmic (Cell) Membrane, Mesosome and Cytoplasm

Bacterial Classification and Structure|0 Comments

1. Cytoplasmic (Cell) Membrane Located just inside the peptidoglycan layer. Phospholipid bilayer similar to eukaryotic membranes, but does not contain sterols (except Mycoplasma species). Functions: [...]

8 03, 2021

The Structure of Bacterial Cells

Bacterial Classification and Structure|0 Comments

Structure Chemical Composition Function Essential Components Cell Wall   Peptidoglycan         Outer membrane of Gram- negative bacteria     Surface fibers of [...]

8 03, 2021

Medically important bacteria that cannot be seen in the Gram stain

Bacterial Classification and Structure|0 Comments

Name Reason Alternative Microscopic Approach Mycobacteria (Ex. M. tuberculosis) Too much lipid in cell wall so dye cannot penetrate Acid-fast stain Treponema pallidum Too thin [...]

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