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Questions and Answers
Which bacterial shape is characterized by being rod-shaped?
Which bacterial shape is characterized by being rod-shaped?
- Coccus
- Bacillus (correct)
- Spirillum
- Vibrio
What is the outermost layer found in many bacteria, usually made of polysaccharides?
What is the outermost layer found in many bacteria, usually made of polysaccharides?
- Serological test
- Toxin
- Spore
- Capsule (correct)
Which type of bacteria require oxygen for growth?
Which type of bacteria require oxygen for growth?
- Aerobic
- Obligate aerobes (correct)
- Obligate anaerobes
- Facultative anaerobes
Which type of bacteria are killed by oxygen?
Which type of bacteria are killed by oxygen?
Which type of bacteria tolerate oxygen but can also grow in its absence?
Which type of bacteria tolerate oxygen but can also grow in its absence?
Which bacterial shape is characterized by being a rigid spiral bacterium?
Which bacterial shape is characterized by being a rigid spiral bacterium?
What defensive structure is an inert structure resistant to physical and chemical challenges?
What defensive structure is an inert structure resistant to physical and chemical challenges?
Which type of bacteria require oxygen for growth?
Which type of bacteria require oxygen for growth?
What type of media produces visible changes in colonies that facilitate identification through the incorporation of chemicals?
What type of media produces visible changes in colonies that facilitate identification through the incorporation of chemicals?
Which technique uses biochemical characteristics, such as the utilization of carbon sources, for bacterial identification?
Which technique uses biochemical characteristics, such as the utilization of carbon sources, for bacterial identification?
Which technique uses an antibody-antigen interaction to help identify bacteria?
Which technique uses an antibody-antigen interaction to help identify bacteria?
What is the outermost layer found in many bacteria, usually made of polysaccharides?
What is the outermost layer found in many bacteria, usually made of polysaccharides?
What type of media permits the growth of one organism over another based on the presence of specific substances?
What type of media permits the growth of one organism over another based on the presence of specific substances?
Which type of bacteria are killed by oxygen?
Which type of bacteria are killed by oxygen?
Which technique produces a characteristic signature based on the generation of ions from a sample?
Which technique produces a characteristic signature based on the generation of ions from a sample?
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Study Notes
Bacterial Shapes
- Bacillus is a type of bacteria characterized by a rod-shaped structure.
Bacterial Cell Wall
- The outermost layer found in many bacteria is usually made of polysaccharides and is known as the capsule.
Bacterial Growth Requirements
- Aerobic bacteria require oxygen for growth.
- Anaerobic bacteria are killed by oxygen.
- Facultative anaerobic bacteria tolerate oxygen but can also grow in its absence.
Bacterial Shapes
- Spirillum is a type of bacteria characterized by a rigid spiral shape.
Defensive Structures
- Endospores are inert structures resistant to physical and chemical challenges.
Media and Identification Techniques
- Differential media produces visible changes in colonies that facilitate identification through the incorporation of chemicals.
- Selective media permits the growth of one organism over another based on the presence of specific substances.
- Biochemical tests use biochemical characteristics, such as the utilization of carbon sources, for bacterial identification.
- Immunological tests use an antibody-antigen interaction to help identify bacteria.
- MALDI-TOF (Matrix-Assisted Laser Desorption/Ionization-Time of Flight) produces a characteristic signature based on the generation of ions from a sample.
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