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30 Cards in this Set

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The flagellar organization (with an outer sheath membrane) found in the spirochetes.
Endoflagella
A spherical bacterium.
coccus
The chromosomal region of a prokaryotic cell.
nucleoid
A bacterium characterized by twisted or curved rods, generally with a rigid cell wall and flagella.
spirillum
A chain of bacterial rods; also a genus name.
streptobacillus
An anionic polysaccharide derivative found in the cell wall of gram-positive bacterial cells.
Teichoic acid
A polyphosphate-storing granule that stains deeply with methylene blue commonly found in diphtheria bacilli; also called volutin.
metachromatic granule
A cytoplasmic storage structure found in many prokaryotic cells.
inclusion body
The gel-like area between the cell membrane and outer membrane in gram-negative bacterial cells.
periplasmic space
An external carbohydrate layer consisting of the capsule or slime layer.
glycocalyx
A bacterium characterized by spheres in a grapelike cluster; also a genus name.
Staphyloccus
A thick surface layer of secreted polysaccharides that serves to protect the cell from desiccation and for attachment to other surfaces.
capsule
A bacterial rod; also a genus name.
bacillus
A small, closed-loop molecule of extrachromosomal DNA that replicates independently of the chromosome.
plasmid
A molecule composed of lipid and polysaccharide, found in the outer membrane of gram-negative bacteria, where it functions as an endotoxin.
Lipopolysaccharide LPS
A short, hair-like structure used by some bacterial cells for attachment.
pilus
A complex molecule of the bacterial cell wall composed of alternating units of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) cross linked by short peptides.
peptidoglycan
A twisted bacterial rod with a flexible cell wall containing axial filaments for motility.
Spirochette
The complex structure consisting of the cell wall and cell membrane.
cell envelope
A thinner, flowing, and less tightly bound form of a glycocalyx.
Slime Layer
A long, hair-like structure composed of protein and responsible for motility in some prokaryotic and eukaryotic microorganisms.
Flagellum
A small, circular DNA molecule that occurs frequently in some bacterial cells and can carry genes for antibiotic resistance.
R plasmid
A protein in the outer membrane of gram-negative bacteria that acts as channels for the passage of molecules into the periplasmic region.
Porin
The representation for the cell membrane where proteins “float” within or on a bilayer of phospholipid.
Fluid mosaic model
A cytoplasmic body in certain bacterial cells that assists orientation to the environment by aligning with the magnetic field.
Magnetosome
A cellular component of RNA and protein that participates in protein synthesis.
Ribosome
A form of bacterium occurring as a curved rod.
vibro
A movement toward a chemical attractant.
chemotaxis
A chain of bacterial cocci; also a genus name.
Streptococcus
A membrane forming part of the cell wall of gram-negative bacterial cells and containing lipopolysaccharide (LPS).
outer membrane