#1
Which of the following is a method for sterilization?
Filtration
ExplanationFiltration is a method for sterilization that uses a physical barrier to remove microorganisms.
#2
What is the term for the smallest infectious agents that rely on host cells to reproduce?
Viruses
ExplanationViruses are the smallest infectious agents that rely on host cells to reproduce, causing various diseases in humans, animals, and plants.
#3
Which of the following is a Gram-positive bacterium?
Streptococcus pyogenes
ExplanationStreptococcus pyogenes is a Gram-positive bacterium that can cause a variety of infections, including strep throat and skin infections.
#4
Which of the following is an example of an opportunistic pathogen?
Candida albicans
ExplanationCandida albicans is an example of an opportunistic pathogen that can cause infections in immunocompromised individuals.
#5
What is the purpose of the polymerase chain reaction (PCR) in molecular biology?
Amplifying DNA segments
ExplanationThe polymerase chain reaction (PCR) is used in molecular biology to amplify DNA segments, allowing for the detection and analysis of specific DNA sequences.
#6
What is the primary function of the immune system?
Protection against pathogens
ExplanationThe primary function of the immune system is to protect the body against pathogens, such as bacteria, viruses, and parasites.
#7
Which microorganism is responsible for tuberculosis?
Mycobacterium tuberculosis
ExplanationMycobacterium tuberculosis is the microorganism responsible for tuberculosis, a contagious bacterial infection that primarily affects the lungs.
#8
Which of the following is an example of a vector-borne disease?
Malaria
ExplanationMalaria is an example of a vector-borne disease, which is transmitted to humans through the bite of an infected mosquito.
#9
What is the purpose of a streak plate in microbiology?
To isolate individual colonies
ExplanationA streak plate is used in microbiology to isolate individual bacterial colonies from a mixed culture.
#10
What is the function of lysozyme in the human body?
Breaking down bacterial cell walls
ExplanationLysozyme is an enzyme that breaks down bacterial cell walls, helping to protect the body against bacterial infections.
#11
Which of the following is a common method for detecting bacterial growth in a culture?
Turbidity measurement
ExplanationTurbidity measurement is a common method for detecting bacterial growth in a culture, based on the cloudiness of the culture medium.
#12
What is the purpose of an autoclave in microbiology?
To sterilize equipment with steam
ExplanationAn autoclave is used in microbiology to sterilize equipment and media using high-pressure steam.
#13
Which of the following is an example of a nosocomial infection?
Hospital-acquired pneumonia
ExplanationHospital-acquired pneumonia is an example of a nosocomial infection, which is an infection acquired in a healthcare setting.
#14
Which of the following is NOT a method of direct transmission of infectious agents?
Vehicle-borne transmission
ExplanationVehicle-borne transmission is not a method of direct transmission of infectious agents; it involves transmission through contaminated objects or substances.
#15
What is the primary purpose of the CDC (Centers for Disease Control and Prevention)?
Promoting public health and safety
ExplanationThe primary purpose of the CDC is to promote public health and safety by controlling and preventing diseases, injuries, and disabilities.
#16
What is the primary target of antiviral medications?
Viral replication processes
ExplanationThe primary target of antiviral medications is viral replication processes, aiming to inhibit viral replication and control viral infections.
#17
In microbiology, what does the term 'aseptic technique' refer to?
Preventing contamination during experiments
ExplanationAseptic technique refers to the practices and procedures used to prevent contamination during experiments and in laboratory settings.