Chapter 27: Prokaryotes
Peptidoglycan
A type of polymer in bacterial cell walls consisting of modified sugars
cross-linked by shorts polypeptides.
Gram Stain
A staining method that distinguishes between two different kinds of
bacterial cell walls.
Gram-positive
Describing the group of bacteria with a cell wall that is structurally
less complex and contains more peptidoglycan than that of gram-
negative bacteria. Gram-positive bacteria are usually less toxic than
gram-negative bacteria.
Gram-negative
Describing the group of bacteria with a cell wall that is structurally
more complex and contains less peptidoglycan than that of gram-
positive bacteria. Gram-negative bacteria are often more toxic than
gram-positive bacteria.
Capsule
(1)
A sticky layer that surrounds the cell walls of some
prokaryotes, protecting the cell surface and sometimes
helping to glue the cell to surfaces. (2) The sporangium of a
bryophyte (moss, liverwort, or hornwort).
Fimbri (Frimbriae)
A short, hair like prokaryote appendage that functions in adherence to
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- Spring '07
- DEMIG-ADDAMS
- Bacteria, bacterial cell walls, symbiotic relationship, gramnegative bacteria, hairlike prokaryote appendage
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