Questions and Answers
Rod-shaped bacteria, some of which are endospore forming, are referred to as?
Bacilli
Beadlike chains of cocci formed after cell division along a single axis are called?
Streptococci
The causative agent for Lyme disease is a?
Spirochete
Bacterial replication is accomplished primarily by?
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Bacteria that use oxygen, but only at a low concentration, are classified as?
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Bacteria that use organic compounds as the source of both carbon and energy are referred to as?
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Microorganisms that show optimal growth in moderate temperatures (between 25 C and 40 C) are called?
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Psychrophiles are also referred to as?
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What organism is a common cause of peptic ulcers?
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A mutation that involves the deletion or insertion of one or more bases is called a?
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Treponema pallidum and Borrelia burgdorferi belong to the group of?
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Legionella and Neisseria are examples of?
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Staphylococci and streptococci are best classified in the group of?
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____________ is a host-dependent bacterium.
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Macrolesions in which the order of bases is switched or inverted are called?
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Bacteria whose overall shape is spherical or nearly spherical are referred to as?
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The time bacteria need to adapt to a medium before cell division starts is called the ________ phase.
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Microorganisms that acquire energy from light are called?
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Microorganisms that grow only in the presence of oxygen are called?
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Non-chromosomal DNA molecules in bacteria are?
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The transfer of genetic material during cell-to-cell contact is?
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A 'bull's-eye' rash is typical of _______ disease.
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Rhizobium is an organism typically used in the field of ________________.
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Staphylococci are _______________ facultative anaerobes.
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Methanogens are _____________ that grow in anaerobic environments such as swamps.
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What is the causative agent of typhoid fever?
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What is the causative agent of gonorrhea?
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What is the causative agent of whooping cough?
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What is the causative agent of Rocky Mountain spotted fever?
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What is the causative agent of gas gangrene?
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Bacteria with a spherical shape are referred to as?
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Comma-shaped rods are referred to as?
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Cocci arranged in cubes of eight after cell division are called?
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Microbes that use chemical compounds as the source of energy and carbon are called?
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Heat-loving organisms are referred to as?
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Study Notes
Bacterial Shapes and Classification
- Rod-shaped bacteria are known as Bacilli; some can form endospores.
- Cocci bacteria that form beadlike chains post-cell division are identified as Streptococci.
- Bacteria with a spherical or nearly spherical shape are referred to as Cocci.
- Comma-shaped rods are termed Vibrios.
- Cocci that arrange in cubes of eight after cell division are called Sarcinae.
Key Bacterial Types and Examples
- Helicobacter pylori is a common causative agent of peptic ulcers.
- Spirochetes include Treponema pallidum and Borrelia burgdorferi, known for their helical shape.
- Gram-negative aerobic examples include Legionella and Neisseria.
- Staphylococci and streptococci are classified as Gram-positive cocci.
- Methanogens are archaea that thrive in anaerobic environments, such as swamps.
Growth Conditions and Metabolism
- Microaerophiles utilize oxygen but only in low concentrations.
- Chemoheterotrophs are bacteria that obtain both carbon and energy from organic compounds.
- Mesophiles prefer moderate temperatures between 25°C and 40°C for optimal growth.
- Cryophiles, also known as Psychrophiles, thrive in cold environments.
- Phototrophs acquire energy from light, while obligate aerobes require oxygen for growth.
Bacterial Replication and Mutation
- Bacteria replicate primarily through binary fission, a form of asexual reproduction.
- A frameshift mutation occurs due to the deletion or insertion of bases in the DNA sequence.
- Inversions involve switching or inverting the order of bases within the DNA.
- The lag phase is the period bacteria adjust to a new medium before replication begins.
Genetic Material and Transfer
- Plasmids are non-chromosomal DNA molecules found in bacteria.
- Conjugation is the process of genetic material transfer between bacteria via direct cell contact.
Pathogens and Associated Diseases
- Lyme disease is characterized by a "bull's-eye" rash, caused by Borrelia.
- Typhoid fever is caused by Salmonella.
- Gonorrhea is attributed to Neisseria gonorrhoeae.
- Whooping cough is linked to Bordetella pertussis.
- Rocky Mountain spotted fever results from Rickettsia rickettsii.
- Gas gangrene is caused by Clostridium perfringens.
Specific Bacterial Features
- Facultative anaerobes like Staphylococci can grow in both the presence and absence of oxygen.
- Rickettsia is identified as a host-dependent bacterium.
- Thermophiles are organisms that thrive in high-temperature environments.
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Description
Test your knowledge on bacterial shapes and their classifications with this quiz. Learn about various bacterial types, such as Bacilli, Cocci, and Vibrios, along with their growth conditions and metabolic processes. Perfect for students of microbiology or anyone interested in the fascinating world of bacteria.
