BackMembers of the Bacterial World quiz #1
06:17
Terms in this set (24)
What are the characteristics of the domain Bacteria?
The domain Bacteria consists of unicellular prokaryotic organisms that lack a nucleus and have cell walls containing peptidoglycan.
Which bacteria produce an enzyme that breaks down urea?
Bacteria such as Proteus species produce the enzyme urease, which breaks down urea.
Which cellular structure is not found in bacteria?
A nucleus is not found in bacteria.
What structures or features are found in bacteria?
Bacteria have cell walls, plasma membranes, ribosomes, and sometimes flagella or pili.
Why is it difficult to group bacteria into species?
It is difficult to group bacteria into species because they reproduce asexually and can exchange genetic material horizontally.
What is the difference between an antibiotic and an antiviral?
Antibiotics target bacteria, while antivirals target viruses.
Which antibiotic inhibits bacterial cell wall synthesis?
Penicillin is an antibiotic that inhibits cell wall synthesis.
Salmonella and Shigella are examples of which risk group agents?
Salmonella and Shigella are examples of Risk Group 2 agents.
What can be a precursor for a bacterial colony?
A single bacterial cell can be a precursor for a bacterial colony.
What are characteristics of a vegetative bacterial cell?
Vegetative cells are metabolically active and capable of growth and reproduction.
Which organisms are pus-forming bacteria that grow in clusters like bunches of grapes?
Staphylococcus species are pus-forming bacteria that grow in clusters.
What enzymes are expressed by some strains of Staphylococcus aureus?
Some strains of Staphylococcus aureus express coagulase and catalase enzymes.
Which microbial form has the highest resistance to physical and chemical controls?
Bacterial endospores have the highest resistance to physical and chemical controls.
What are the typical symptoms of foodborne illness caused by Salmonella species?
Salmonella species can cause foodborne illness characterized by diarrhea, fever, and abdominal cramps.
Which group of bacteria is known for containing organisms that are predators on other bacteria?
Bdellovibrio is a group of bacteria known for preying on other bacteria.
What is a trait that is not phenotypic in bacteria?
Having a nucleus is not a phenotypic trait of bacteria.
Microscopic examination of cerebrospinal fluid reveals gram-positive rods. What is the organism?
Gram-positive rods in cerebrospinal fluid may indicate Listeria monocytogenes.
How does Propionibacterium acnes cause acne in humans?
Propionibacterium acnes contributes to acne by colonizing hair follicles and causing inflammation.
What is one type of bacteria found in a healthy gut microbiome?
Lactobacillus species are commonly found in a healthy gut microbiome.
Which type of bacteria can be found in dairy products and can have health-enhancing properties?
Lactobacillus species are found in dairy products and can have probiotic effects.
Which characteristic proves Lactobacillus acidophilus is from the specific kingdom Eubacteria?
Lactobacillus acidophilus is a unicellular prokaryote with a cell wall containing peptidoglycan.
During which growth phase will gram-positive bacteria be most susceptible to penicillin?
Gram-positive bacteria are most susceptible to penicillin during the log (exponential) phase.
What type of bacteria grow on plates that contain ampicillin?
Only bacteria with genes conferring resistance to ampicillin will grow on such plates.
How can bacteria develop resistance to antibiotics?
Bacteria can develop resistance to antibiotics through genetic mutations or acquiring resistance genes.