Micro Bio Chp 11 Exam 2
vary in size and shape
Which of the following bacterial arrangements is the result of snapping division?
The arrangement represented in the figure is typical of which of the following genera of bacteria?
What bacterial structure is responsible for separating the daughter DNA molecules after replication?
may be produced when nutrients are scarce.
Bergey's Manual of Systematic Bacteriology contains
classification schemes for prokaryotes
Which of the following characteristics distinguish the archaea from the bacteria?
cell wall composition, cytoplasmic membrane lipids, and 16S rRNA sequences
The archaea known as halophiles
are members of the Euryarchaeota and require salt concentrations above 9%
Low G + C content Gram-positive bacteria are
in the phylum Firmicutes and include Clostridia and Mycoplasma
Which of the following diseases is NOT associated with bacteria that form endospores?
toxic shock syndrome
Mycoplasmas are pleomorphic because they
have no cell walls
Which of the following bacterial genera produce endospores?
both Bacillus and Clostridium
Which of the following bacterial genera includes species that protect areas of the body such as the intestinal tract and the vagina from invasion by pathogens?
Which of the following groups of bacteria is named for its resemblance to fungi?
Which of the following bacterial genera is used for the degradation of environmental pollutants?
Which of the following is NOT associated with bacteria in the genus Streptomyces?
protection of plants against caterpillars
What feature of mycobacteria is responsible for the unusually slow growth of these bacteria?
The mycolic acid in their cell walls requires signification metabolic investment.
A large number of Gram-negative human pathogens are members of the
Members of which of the following genera are the most common sexually transmitted bacteria in the United States?
A microbiologist observes what appears to be a pink-staining long rod within the periplasmic space of a Gram-negative bacillus. What is the structure likely to be?
Which of the following statements regarding pseudomonads is FALSE?
They are symbiotic with plants for nitrogen fixation.
A flexible, spiral shaped bacterium is called a
Which of the following statements regarding mycoplasmas is FALSE?
They stain Gram-positive
The anaerobic Clostridium species are troublesome pathogens largely because of their capacity for
Gram negative facultative anaerobes that metabolize carbohydrates via glycolysis are members of the
A Gram-positive psychorotrophic rod _____ is a frequent contaminant of milk and meat and an opportunistic pathogen of the immunocompromised.
A species of the genus Streptococcus is the leading cause of
"flesh-eating" bacterial infections.
The genus Mycobacterium includes species responsible for
Members of the genus Chlamydia are
Pseudomona species are occasional causes of
urinary tract infections
The process by which a bacterial cell produces an endospore is called (endosporing/ sporulation/ vegetation).
The most common form of reproduction among prokaryotes is (snapping/ budding/ binary)
The rod-shaped (rickettsias/ chlamydias/ brucella) are intracellular parasitic members of the alphaproteobacteria.
Some members of the alphaproteobacteria produce a structure called a (prosthecae/ pilus/ filament) to produce extra surface area for nutrient absorption.
This bacterial shape is called (bacillus/ vibrio/ rod).
The G + C content is an (RNA/ structural/ genetic) determination used in classifying the different taxa of Gram positive bacteria.
The (streptobacilli/ actinomycetes/ mycoplasmas) are a group of Gram-positive bacteria that form branching filaments resembling those of fungi.
The Genus of pathogenic cocci responsible for a wide range of human disease and whose members grow in chains is (Staphylococcus/ Streptococcus/ Enterococcus).
The members of the (alphaproteobacteria/ gammaproteobacteria/ actinomycetes) may alternate between a flagellated motile stage and a nonmotile stage attached by means of a prosthecae.
The reduction of nitrogen gas to ammonia is called nitrogen (fixation/ cycling).
Slow growing bacteria in the genus (Mycoplasma/ Mycobacterium) are able to withstand long exposure to air because of the presence of mycelic acid in their cell wall structure.
Plant tumors caused by Agrobacterium infections are called (galls/ heterocyst).
The (bacilli/ Lactobacilli/ bacteroids) are a group of Gram-negative bacteria that include obligate anaerobes normally found in the intestinal tract of animals and humans.
The infective stage of chlamydia is called the (elementary/ initial) body.
Burkholderia is a common (true/ opportunistic) pathogen of patients with cystic fibrosis.