IndietroIntroduction to Microbiology quiz #2
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During which condition does the monocyte count increase the most?
Monocyte count increases most during chronic infections.
What method results in isolated colonies within and on top of the agar?
The streak plate method results in isolated colonies within and on top of the agar.
What type of food is least likely to support bacterial growth?
Dry foods, such as crackers, are least likely to support bacterial growth.
Why is it important to avoid contamination when subculturing to a slant?
Avoiding contamination ensures that only the desired microbe is transferred and studied.
What is a high-level disinfectant that can inactivate biological spores?
Glutaraldehyde is a high-level disinfectant that can inactivate spores.
Which test tube(s) acts as a negative control?
A test tube without the experimental variable acts as a negative control.
Which organisms can be destroyed by cationic detergents?
Cationic detergents can destroy bacteria and some viruses.
Which is not a method of transmission for medically important protozoa?
Airborne transmission is not common for medically important protozoa.
Which is more fit – antibiotic-resistant bacteria or antibiotic-sensitive bacteria?
Antibiotic-resistant bacteria are more fit in environments with antibiotics.
What is oral rehydration therapy (ORT) effective for?
ORT is effective for treating dehydration caused by diarrheal diseases.
What would happen if a pathogen lost the ability to make adhesins?
The pathogen would have reduced ability to attach to host cells and cause infection.
How did the earliest single-celled microorganisms produce energy to drive metabolic processes?
Earliest single-celled microorganisms produced energy through anaerobic metabolic processes.
Which term describes a microbe that grows in a habitat with a high solute concentration?
A halophile grows in habitats with high solute concentration.
Which name is given to microbes that grow in environments where the pH is lower than 7?
Acidophiles grow in environments with pH lower than 7.
Why is it necessary to dilute a sample in order to determine bacterial numbers?
Dilution allows for counting individual colonies and accurate estimation of bacterial numbers.
Which bacterium is not a likely member of the normal skin microbiota?
Escherichia coli is not a likely member of the skin microbiota.
What is the purpose of the sterile spreader?
A sterile spreader is used to evenly distribute microbes on the surface of agar plates.
What type of spores are used in the laboratory to identify fungi?
Fungal spores, such as conidia, are used to identify fungi in the laboratory.
What does a pure culture contain?
A pure culture contains only one species of microorganism.
How are hantaviruses primarily transmitted to humans?
Hantaviruses are transmitted to humans primarily through contact with rodent excreta.
What does the presence of leukocytes in urine indicate?
Leukocytes in urine indicate a possible urinary tract infection.