Test
Bacteriology 1
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Preguntas del test (17)
1True/false: prokaryotes have a nucleus
- AVerdadero
- BFalso
2Which of the following is a TRUE of the bacterial cell wall?
- Aprovide non-selective transport
- Bprovide protection against mechanical damage and osmotic lysis
- Cdifferences in structure and chemical composition lead to different staining properties and pathogenicity
- Dprovide rigidity to the cell wall
3True/false: peptidoglycan is a chain of alternating subunits of NAG and NAM crosslinked with short peptides.
- AVerdadero
- BFalso
4Which of the following is the correct way to perform a Gram stain?
- A1) application of safranin, 2) application of iodine, 3) application of crystal violet, 4) alcohol wash
- B1) application of crystal violet, 2) application of iodine, 3) application of safranin, 4) alcohol wash
- C1) application of crystal violet, 2) application of iodine, 3) alcohol wash, 4) application of safranin
5Which of the following is a characteristic of Gram-positive bacteria?
- Acontain teichoic acids
- Bthick multilayered peptidoglycan layer
- Cthin single-layered peptidoglycan layer
- Dcontain lipoteichoic acids
- Ehighly resistant to physical disruption and drying
6Which of the following is a characteristic of Gram-negative bacteria?
- Acontain teichoic acids
- Bcontain lipoteichoic acids
- Cthin single-layered peptidoglycan layer
- Dcontain lipopolysaccharides (LPS)
- Elow resistance to physical disruption
7True/false: a lipopolysaccharide is an endotoxin produced by Gram-positive bacteria that is released upon cell disruption
- AVerdadero
- BFalso
8True/false: the lipid A portion of an LPS is the most virulent part of LPS.
- AVerdadero
- BFalso
9Which of the following is a characteristic of mycobacteria?
- Arich in mycolic acids
- Bthick waxy hydrophobic cell wall
- Cthick peptidoglycan cell wall
- Dmust use acid fast staining for diagnosis
10True/false: mycoplasma have a cell wall
- AVerdadero
- BFalso
11Which of the following is NOT a characteristic of the plasma membrane?
- Aflexible structures
- Bno sterols
- Clayers are composed of phospholipids and carbohydrates
- Douter faces are hydrophilic and interior is hydrophobic
12Which of the following is a function of plasma membranes?
- Aeliminates waste metabolites
- Belectron transport for bacterial respiration
- Cactive transport for nutrients
- Dsite of phosphorylation
13True/false: a mesosome is an invagination of the plasma membrane into the cytoplasm
- AVerdadero
- BFalso
14Which of the following describes a nucleoid?
- Asmall circular pieces of DNA
- Bregion in the cell currently occupied with the nuclear material
- Cused for motility
15True/false: plasmids are small circular pieces of DNA capable of autonomous replication
- AVerdadero
- BFalso
16Which of the following is a function of a capsule?
- Anutrient reserve
- Bprovides protection from adverse environmental conditions
- Cfacilitate adherence to host cell surfaces
- Dphosphorylation occurs here
17Which of the following is NOT a characteristic of endospores?
- Aproduced by genera Clostridium and Bacillus
- Bensure survival during adverse environmental conditions
- Cmost durable type of cell found in nature
- DAll of the above are correct
Información
- Descripción
- Exam 3 Microbiology Test sobre Bacteriology 1 , creado por Gabrielle Reece el 07/11/2020.
- Autor
- Gabrielle Reece
- Idioma
- English
- Visitas
- 17
- Historial
- Creado el 7 nov 2020 · actualizado el 11 nov 2020
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test