Flashcards in Practice Quiz Unit 3 Deck (35):
Both gram+ and gram-.
Located in cell wall. Gram+ cells have very thick cell wall due to peptidoglycan.
Attaches cell wall to membrane.
Located in outer membrane.
Located between two membranes.
Located in outer membrane and form transmembrane channels that allow passage of hydrophilic molecules.
Toxic portion of lipopolysaccharide.
Component of out membrane.
Polysaccharide antigen located in lipopolysaccharide.
Beta Lactam Antibiotics
More effective in cells during logarithmic growth phase. Targets newly forming peptidoglycan
Targets DNA gyrase and DNA topoisomerase (?).
Promotes deposition of fibrin and walls off S. aureus.
Microbe enters into relationship with host.
Bacterial structure most commonly involved in mediating adherence of bacteria to human cells.
Gram+. Forms chains.
Mostly likely to be found as part of normal bowel flora.
Associated with antibiotic use due to antibiotic resistance. Causes diarrhea.
Part of normal flora w/o causing disease.
GI disease related to toxin production.
Allows growth of gram- bacteria only.
Lactose Fermenting Bacteria (when grown on McConkey agar)
E. coli, Klebsiella pneumoniae
Adheres to peptidoglycan, which makes thick cell wall in gram+ cells.
Allows bacteria to express different antigenic forms of pili.
Bacteriophage Converion (Lysogenic Conversion)
Mechanism of phage mediated transfer. Process where bacteria incorporates phage DNA that confers a new phenotypic trait into own genome. Allows diptheriae to express diptheria toxin.
Virulence factor most associated with Staph epidermis
Naked strands of DNA are incorporated into bacterial genome. Possible in both gram+ and gram- bacteria.
Mechanism of phage-mediated transfer. Gene transfer mediated by a bacteriophage, where any segment of donor phage (bacterial?) genome is passed into another cell.
Form of genetic transfer that is dependent upon contact between donor and recipient cells. Usually mediated by certain types of bacterial plasmids.
Are often expressed only under conditions of low iron.
May be obtained in complex transposons, during bacteriophage conversion, or in the acquisition of plasmids.
Phage multiplication leading to host cell lysis.
DNA sequence that can change its position within the genome.
Consists of phage DNA which is linearly inserted into host cell genomes where it becomes passively replicated as part of host bacterial chromosome.
Insertion Sequence Transposon
Encode transposase. Inactivate genes into which they are transposed or turn on expression of adjacent genes.
Similar to regular transposons but carry additional genes such as those encoding antibiotic resistance, toxins, or other virulence factors.
LPS from cell walls of gram- bacteria
Toxin secreted by bacteria.