Test
Secretion and Adhesion System Questions
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (17)
1Cholera toxin is secreted by a mechanism that mimics what process
- AType I pilus formation
- BFlagellar synthesis
- CConjugation
- DType IV pilus formation
2Which secretion system has a needle complex for injection of bacterial toxins into the host cell?
- AType I
- BType II
- CType III
- DType IV
3Which species injects a receptor for the adhesin intimin into the host cell?
- ABordetella pertussis
- BSalmonella typhimurium
- CBacillus anthracis
- DVibrio cholerae
- EEscherichia coli
4How does Shigella enter the host cell?
- AIt binds and invade the cell by secreting proteases to digest the host cell membrane
- BIt secretes factors that cause host cell apoptosis
- CIt secretes factors that cause the host cell membrane to be smooth and thin, enabling invasion
- DIt injects proteins that change the host cell cytoskeleton, causing engulfment of the bacteria
5Adherence
Type I: [blank_start]SecA-dependent[blank_end]
Type IV: [blank_start]SecA- independent[blank_end]- ASecA-dependent
- BSecA- independent
6Match the category of exotoxin to the correct example.
[blank_start]Plasma membrane disruption[blank_end] Staphylococcus aureus alpha toxin
[blank_start]Cytoskeleton alterations[blank_end] Vibrio cholerae RTX toxin
[blank_start]Protein synthesis disruption[blank_end] Diphtheria toxin
[blank_start]Cell cycle disruption[blank_end] E. coli cytolethal distending toxin
[blank_start]Signal transduction disruption[blank_end] Cholera toxin
[blank_start]Cell-cell adherence[blank_end] Staphylococcus aureus exfoliative toxin
[blank_start]Vesicle traffic[blank_end] Helicobacter pylori VacA toxin
[blank_start]Exocytosis[blank_end] Tetanus toxin
[blank_start]Superantigens[blank_end] Staphylococcus auerus and Streptococcus pyogenes pyrogenic toxins- APlasma membrane disruption
- BCytoskeleton alterations
- CProtein synthesis disruption
- DCell cycle disruption
- ESignal transduction disruption
- FCell-cell adherence
- GVesicle traffic
- HExocytosis
- ISuperantigens
7Which secretion system uses a conjugation-like machinery to secrete protein from cytoplasm or periplasm?
- AType I
- BType II
- CType III
- DType IV
8Which secretion system uses molecular syringe to inject proteins from bacterial cytoplasm into host cytoplasm?
- AType I
- BType II
- CType III
- DType IV
9What type of secretion system uses pilus-like extraction/retraction mechanism to push proteins out of the cell
- AType I
- BType II
- CType III
- DType IV
10[blank_start]Cilia[blank_end], [blank_start]fimbriae[blank_end], and [blank_start]pili[blank_end] are all examples of structures used by microbes for adhesion.
- ACilia
- Bfimbriae
- Cpili
11You have recently identified a new toxin. It is produced by a gram-negative bacterium. It is composed mostly of protein, has high toxicity, and is not heat stable. You also discover that it targets liver cells. Based on these characteristics, how would you classify this toxin?
- ASuperantigen
- BEndotoxin
- CExotoxin
- DLeukocidin
12You have recently identified a new toxin. It is produced by a gram-negative bacterium. It is composed mostly of polysaccharides, binds to immune cells, and triggers fevers. Based on these characteristics, how would you classify this toxin?
- ASuperantigen
- BEndotoxin
- CExotoxin
- DAdhesin
13Match the toxin to its secretion system.
[blank_start]Salmonella typhimurium[blank_end] [blank_start]Type III[blank_end] Uses molecular syringe to inject proteins from bacterial cytoplasm into host cytoplasm
[blank_start]Pertussis toxin[blank_end] [blank_start]Type IV[blank_end] Uses a conjugation-like machinery to secrete protein from cytoplasm or periplasm
[blank_start]Cholera toxin[blank_end] [blank_start]Type II[blank_end] Uses pilus-like extraction/retraction mechanism to push proteins out of the cell
[blank_start]E. coli alpha hemolysin[blank_end] [blank_start]Type I[blank_end] Uses ABC mechanisms that move certain secreted proteins directly out of the cell- ASalmonella typhimurium
- BType III
- CPertussis toxin
- DType IV
- ECholera toxin
- FType II
- GE. coli alpha hemolysin
- HType I
144. Which of the following pathogens does not have endotoxin?
- ABacillus anthracis
- BYersinia pestis
- CVibro cholerae
- DSalmonella typhimurium
15If SecA were mutated, E. coli could adhere to renal cells but would be unable to secrete exotoxins to cause infection.
- AVerdadero
- BFalso
1615. How does the plague bacterium survive the immune response?
- AAntigenic variance of its distinguishing surface features
- BInjecting exotoxins that kill macrophages
- CForming spores to survive phagocytosis
- DSilencing pro-inflammatory cytokines
17You observe a protein structure that has two subunits and is involved in bacterial pathogenesis. This protein is most likely which of the following?
- AHost cell receptor
- BCapsid protein
- CExotoxin
- DEndotoxin
- EPili subunit
Información
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- El usuario ha eliminado su información de asignaturas Test sobre Secretion and Adhesion System Questions, creado por Usuario eliminado el 12/11/2018.
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