Questions and Answers
All of the following bacteria are motile; which does NOT have a flagella?
Which of the following are found primarily in the intestines of humans?
Which of the following statements about the causative agent of Rocky Mountain spotted fever is false?
Which of the following bacteria are responsible for more infections and more different kinds of infections?
Signup and view all the answers
You have isolated a bacterium that grows in a medium containing an organic substrate and nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. You can be sure that this bacterium is...
Signup and view all the answers
Staphylococcus and Streptococcus can be easily differentiated in a laboratory by which one of the following?
Signup and view all the answers
Which of the following is NOT a characteristic of spirochetes?
Signup and view all the answers
Which of the following lacks a cell wall?
Signup and view all the answers
Which of the following bacteria is gram-negative?
Signup and view all the answers
Which of the following bacteria is gram-positive?
Signup and view all the answers
Escherichia coli belongs to
Signup and view all the answers
Which of the following is the best reason to classify Streptococcus in the Lactobacillates?
Signup and view all the answers
Borrelia is classified as a spirochete because it
Signup and view all the answers
You have isolated a prokaryotic cell. The first step to identification is a(n)...
Signup and view all the answers
Mycoplasmas differ from other bacteria in that they...
Signup and view all the answers
Caulobacter are different from most bacteria in that they?
Signup and view all the answers
Rickettsias differ from chlamydias in that rickettsias...
Signup and view all the answers
Thiobacillus oxidizes inorganic sulfur compounds and reduces CO2. This bacterium is a...
Signup and view all the answers
Study Notes
Bacterial Motility and Characteristics
- Spirochetes: Motile bacteria that do not possess flagella.
- Facultatively anaerobic gram-negative rods: Primarily found in the human intestines.
Rocky Mountain Spotted Fever
- False statement: The causative agent is not found in soil and water.
Infections
- Streptococcus species: Known for causing a wide variety and high number of infections.
Bacterial Respiration
- Anaerobic respiration: Involves bacteria that can reduce nitrate to nitrogen gas without oxygen.
Laboratory Differentiation
- Staphylococcus vs. Streptococcus: Differentiated by their ability to grow in high salt concentrations.
Characteristics of Spirochetes
- Brightfield microscopy does not easily reveal spirochetes.
Cell Wall Composition
- Mycoplasma: Lacks a cell wall, distinguishing it from other bacteria.
Gram Staining
- Treponema: Identified as a gram-negative bacterium.
- Streptococcus: Classified as a gram-positive bacterium.
Taxonomy
- Escherichia coli: Belongs to the Proteobacteria phylum.
- Classification of Streptococcus: Based on rRNA sequences, placing it in the Lactobacillates.
Spirochetes and Axial Filaments
- Borrelia: Classified as a spirochete due to the presence of an axial filament.
Prokaryotic Cell Identification
- First step in identification: Conduct a Gram Stain.
Mycoplasmas
- Unique due to the absence of a cell wall.
Caulobacter Characteristics
- Caulobacter: Notable for having stalks, setting them apart from most bacteria.
Rickettsias vs. Chlamydias
- Rickettsias: Require an anthropod vector for transmission, unlike chlamydias.
Thiobacillus Metabolism
- Identified as a chemoautotroph due to its ability to oxidize inorganic sulfur compounds and reduce CO2.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on various types of bacteria with this Chapter 11 quiz. Answer questions on motility, intestinal bacteria, and causative agents of diseases. Perfect for microbiology students looking to enhance their understanding of bacterial classification.
