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34 Cards in this Set

  • Front
  • Back
What is the largest known prokaryote?
Thiomargarita namibiensis (750 um in diameter)
Have ester-linked lipids with unbranched fatty acids
have ether-linked branched fatty acids
Gram-negative flagellum
The S & M rings are attached to the plasma membrane. And there are two additional outer rings, designated L & P.
The L ring is anchored in the outer membrane of the cell wall
The P ring is anchored to the peptidoglycan
Gram-positive flagellum
The S RING is anchored to the peptidoglycan and the M ring is associated with the cell membrane
_______ is a disease due to an aerobic spore-forming member of the genus Bacillus.
______ is the genus of spore-forming bacteria whose species can cause botulism.
Three shapes of spiral bacteria
vibrio, spiral, and spirochetes
vibrio shape
curved rods that resemble commas
helical shape, a rigid cell wall, & flagella for movement
corkscrew shape, a flexible cell wall & no flagella
movement occurs by contractions of the cell
_______ is the organic compound that helps stabilize bacterial spores and is only found in endospores
dipicolinic acid
_______ organisms require a partial pressure of carbon dioxide greater than normal in order to grow well.
The gram-positive cell wall is composed primarily of _______ with ____ woven into a latticework.
teichoic acid
What are three other shapes of bacterial cells.
Star and square
star and square
Caulobacter crescentus
An adhering layer of polysaccharides or polysaccharides and small proteins.
Glycocalyx-What are the two layers?
A capsule can be thick and tightly bound to the cell whereas the slime layer is thinner, diffuse, and less tightly bound.
Which bacterium was isolated from the intestinal contents of a mastodon, making it the oldest living known bacteria recovered (excluding spores)?
Enterobacter cloacae
A protein in bacterial pili that assists in attachment to the surface molecules of cells; a binding molecule that encourages parasites to hold firmly to the tissues of their host.
Basal Body
A structure at the base of a bacterial flagellum having a central rod and set of enclosing rings.
Binary fission
An asexual process by which a cell divides to form two new cells; specifics of the process vary among organisms
A movement toward a chemical attractant.
Many gram-postive and gram-negative rods and cocci secrete adhering layer of polysaccharides or polysaccharides and small proteins called the glycocalyx. The layer can be thick and tightly bound to the cell, in which case it is known as a capsule. When thinner, diffuse, and less tightly bound, it is referred to as a slime layer. This slime layer usually contains a mass of tangled fibers of a polysaccharide called dextran. The fibers attach the bacterium to tissue surfaces
A metabolic poison produced chiefly by Gram-negative bacteria; endotoxins are part of the bacterial cell wall and consequently are released on cell disintegration; composed of lipid-polysaccharide peptide complexes
A short, hairlike structure used by bacteria for attachment; sometimes used as an altenrative form for pilus
The hollow filament (which is part of the flagella) is composed of long, rigid and helical strands of protein subunits called flagellin.
Inclusion body
A granulelike storage body that forms in the bacterial cytoplasm
Periplasmic space
contains several enzymes that process molecules before they enter the cytoplasm, also contains proteins that act as carriers of nutrients, group of enzymes that are capable of inactivating antibiotics
Protein appendages that appear as short hair-like fibers, which are composed of pilin, there can be sex pili and attachment pili. The attachment pili anchors the bacteria to a surface such as tissue via adhesins, which in turn increases its disease causing capabilities
A protein subunit found in the bacterial pilus.
Teichoic acid
polysaccharide found in the cell wall of gram positive bacteria