Skip to main content
Indietro

Microbiology: Bacterial Structure, Function, and Pathogenicity

I pulsanti di controllo sono stati cambiati in modalità "navigazione".
1/29

Termini in questo insieme (29)

  • Bacterial arrangement of grape-like clusters

    Staphylococci describes bacteria arranged in grape-like clusters.

  • Effect of mutation preventing Braun's lipoprotein production in Gram-negative bacteria

    Leads to loss of structural connection between the outer membrane and peptidoglycan layer.

  • Bacterial feature contributing to persistent biofilm formation on medical implants

    Capsule/slime layer production directly contributes to biofilm persistence.

  • Characteristic distinguishing Gram-positive from Gram-negative bacteria rapidly

    Presence of outer membrane and LPS is most informative.

  • Bacterial structure that helps survive phagocytosis

    Capsule protects bacteria from phagocytosis.

  • Adaptation improving bacterial survival during prolonged starvation

    Endospore formation enhances survival under starvation.

  • Reason for increased tumbling frequency in bacterial movement

    Likely due to increasing repellent concentration in the environment.

  • Best bacterial structure target to stop protein synthesis

    Ribosomes are the best target to inhibit bacterial protein synthesis.

  • Why switching to L-form helps bacteria survive cell wall-inhibiting antibiotics

    Because the cell wall target is absent in L-forms.

  • Effect of mutation preventing counterclockwise flagellar rotation on chemotaxis

    Cells cannot tumble and reorient, impairing chemotaxis.

  • Why cocci do not require MreB protein

    Because they are naturally spherical and do not need MreB for shape maintenance.

  • Mutation most likely to reduce bacterial pathogenicity

    Loss of capsule production reduces pathogenicity.

  • Reason acid-fast bacteria are difficult to treat

    They have a mycolic acid-rich cell wall that reduces permeability.

  • Component connected to peptidoglycan by arabinogalactan in acid-fast bacteria

    Mycolic acid layer is connected to peptidoglycan by arabinogalactan.

  • Structure facilitating direct antibiotic resistance gene transfer between bacteria

    Conjugation pilus facilitates gene transfer.

  • Cell wall component most likely causing inflammation

    Peptidoglycan-derived molecules trigger inflammation.

  • Bacterium with acid-fast cell wall

    Mycobacterium tuberculosis has an acid-fast cell wall.

  • Effect of losing outer membrane but retaining peptidoglycan

    Reduced barrier protection against antibiotics.

  • Reason a bacterium retaining crystal violet stain is Gram-positive

    Because of a thick peptidoglycan layer.

  • Attractive vaccine target on Gram-negative pathogens due to antigenic variation

    O antigen is a surface-exposed target with antigenic variation.

  • Strongest evidence that a microbe is a bacterium rather than a eukaryote

    Presence of 70S ribosomes indicates a bacterium.

  • Why plasmids are a major public health concern

    They can spread antibiotic resistance genes.

  • Effect of losing MreB protein in bacteria

    Shape changes from rod to coccoid.

  • Bacterial classification for cells in cube-like packets of eight

    Sarcinae describes cube-like packets of eight cells.

  • Structure regulating buoyancy in photosynthetic aquatic bacteria

    Gas vesicles regulate buoyancy.

  • Accuracy of claim that all bacterial motility requires flagella

    Incorrect; pili-mediated twitching and gliding motility also occur.

  • Structure contributing most to endotoxic effects of Gram-negative bacteria

    Lipid A is responsible for endotoxic effects.

  • Structure unique to Gram-negative bacteria

    Outer membrane is unique to Gram-negative bacteria.

  • Structure useful for bacteria navigating Earth's magnetic field

    Magnetosome helps navigation along magnetic fields.