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