questions for micro exam 1
A gram negative bacteria the space between the inner and outer membranes is referred to ass?
periplasmic space
Which of the following is most appropriately associated with the role of bacterial fimbriae?
Attachment
As a bacterial spore develops a double membrane is formed around a copy of chromosomal DNA peptidoglycan will accumulate between these membrane layers to form the?
Cortex
once the leading cause of bacterial meningitis the number of cases of blank have been drastically reduced following the developments and use of an effective vaccine in 1990
Haemphilus influenzae type B
Iodine is used in the Gram staining procedure in order to complex with crystal violet which increases the affinity of the stain for the cells. which of the following terms describes the role of iodine in this procedure?
Mordant
discuss the 4 characteristics categories used to distinguish and classified bacteria
Morphology- shape and arrangement metabolism - energy products carbon source by products Habitat- temperature and Ph Molecular- GC content
The only bacteria that do not contain a cell wall members of the genus is?
Mycoplasma
Bacterial infections that are most commonly acquired as a result of hospitalization are referred to as--- infections?
Nosocomial
Which of the following describes the flagellar organization shown in the image below?
Peritrichous
The movement of bacteria by use of flagella often involves a spin filament counterclockwise 95%of the time and clockwise 5%to move through an environment and reposition as needed. What term is used to describe this characteristics movement pattern?
Run and tumble
picture-- corkscrewed shaped cells into no particular arrangement with one
Spirochete
Picture-random clusters of spherical cells
Staphylococcus
Picture-Rod shaped cells attached forming chains
Streptobacilli
blank is a group B Streptococcus and a potential cause of neonatal meningitis preventive care involves examining a pregnant women for vaginal carriage of this bacterium and treatment with antibacterial if needed.
Streptococcus agalactiae
Robert Koch discovered
Bacillus anthracis
A microbial blank is a complex aggregation of cells in which they are held together by an extracellular polysaccharide matrix. microbes use these community structures to resist antimicrobials as well as to adhere to surface.
Biofilm
Which of the following is not true about bacterial endospores?
They are reproductive structures of bacteria
Blank is a cell that is currently not undergoing sporulation, rather is growing and metabolizing in suitable environmental conditions
Vegetative Cell
Which of the following dimensions as a diameter is a reasonable expectation for the size of a typical bacterium?
3 micrometer
The flagellum of eukaryote is structurally different from that of a prokaryote what is the term used to describe the structure of the eukaryotic flagellum?
9+2 microtubule arrangement
Essay questions Define the term pathogen
A pathogen is usually defined as a microorganism that causes, or can cause, disease. We have defined a pathogen as a microbe that can cause damage in a host.
All bacteria cells posses which of the following cell structure?
Cell membrane
which of the following cell structures is most associated with the outcome of gram stain?
Cell wall
Taxonomy is the study of scientific classifications and more nomenclature assigning names in biology, which of the following is written properly?
Clostridioides difficile NAP1
The microorganisms that typically are found in living in and on our bodies are collectively referred to as?
Commensal microbiota
Sporulating bacteria produce the chemical -blank during spore formation which accumulates to dehydrate the developing endospore
DPA
The natural process of breaking down organic and inorganic materials by microorganisms called?
Decomposition
The H antigen found on a wide variety of bacterial cells is commonly used to distinguish bacteria and even individuals strains of a particular species. what does the H antigen referred to?
Filament
which of the following structure is an axial filament of a spirochete most similar to ?
Flagellum
Which of the following is primary role of membranes of a cell?
Function as selectively permeable barrier to separate two environments
The process of an endospore returning to an actively growing cellular state is known as?
Germination
The--- is a structure typically made of repeating carbohydrate units that sits immediately outside the bacterial cell envelope, it functions to provide a hydration layer and protection against viruses, chemicals, and host immune system.
Glycocalyx
which of the following best describes the role of the cell wall bacterium?
The cell wall maintains the shape of the cell
which of the following is Not one of the reasons discussed as to why microorganisms are useful tools for studying basic biology?
They all possess the same requirements for growth