Microbiology & Immunology

Q. What is the primary purpose of vaccination?
  • A. To treat existing infections
  • B. To induce passive immunity
  • C. To stimulate an adaptive immune response
  • D. To enhance innate immunity
Q. What is the primary role of phagocytes in the immune response?
  • A. To produce antibodies
  • B. To present antigens to T cells
  • C. To engulf and destroy pathogens
  • D. To release histamines
Q. What is the primary role of T helper cells in the immune response?
  • A. Directly kill infected cells
  • B. Produce antibodies
  • C. Activate B cells and cytotoxic T cells
  • D. Phagocytose pathogens
Q. What is the primary target of the hepatitis B vaccine?
  • A. Hepatitis A virus
  • B. Hepatitis B virus
  • C. Hepatitis C virus
  • D. HIV
Q. What is the primary vector for the transmission of malaria?
  • A. Aedes mosquito
  • B. Culex mosquito
  • C. Anopheles mosquito
  • D. Tsetse fly
Q. What is the recommended contact time for a 10% bleach solution to effectively disinfect surfaces?
  • A. 1 minute
  • B. 5 minutes
  • C. 10 minutes
  • D. 15 minutes
Q. What is the role of a biological indicator in sterilization processes?
  • A. To measure temperature
  • B. To confirm the presence of microorganisms
  • C. To verify the effectiveness of sterilization
  • D. To disinfect surfaces
Q. What is the role of a biological indicator in sterilization?
  • A. To measure temperature
  • B. To confirm the presence of microorganisms
  • C. To verify the effectiveness of the sterilization process
  • D. To indicate the type of sterilization method used
Q. What is the role of alcohol in disinfection?
  • A. To kill spores
  • B. To denature proteins and disrupt membranes
  • C. To oxidize cellular components
  • D. To inhibit nucleic acid synthesis
Q. What is the role of antibodies in the immune response?
  • A. Directly kill pathogens
  • B. Neutralize toxins and pathogens
  • C. Activate complement system
  • D. All of the above
Q. What is the role of antibodies in the immune system?
  • A. To directly kill pathogens
  • B. To neutralize toxins
  • C. To enhance phagocytosis
  • D. All of the above
Q. What is the role of antigen-presenting cells (APCs) in the immune response?
  • A. To produce antibodies
  • B. To present antigens to T cells
  • C. To directly kill pathogens
  • D. To secrete cytokines
Q. What is the role of autoclaving in sterilization?
  • A. It uses chemical agents to kill microorganisms.
  • B. It uses high pressure and steam to achieve sterilization.
  • C. It relies on ultraviolet light to disinfect surfaces.
  • D. It is a method of physical disinfection only.
Q. What is the role of cytokines in the immune response?
  • A. To directly kill pathogens
  • B. To signal and regulate immune cell activity
  • C. To form antibodies
  • D. To enhance phagocytosis
Q. What is the role of dendritic cells in the immune response?
  • A. To produce antibodies
  • B. To present antigens to T cells
  • C. To kill infected cells
  • D. To secrete cytokines
Q. What is the role of dendritic cells in the immune system?
  • A. Produce antibodies
  • B. Present antigens to T cells
  • C. Kill pathogens directly
  • D. Secrete cytokines
Q. What is the role of helper T cells in the immune response?
  • A. Directly kill infected cells
  • B. Stimulate B cells and cytotoxic T cells
  • C. Produce antibodies
  • D. Engulf pathogens
Q. What is the role of surfactants in disinfection?
  • A. Increase the pH of the solution
  • B. Enhance the penetration of disinfectants
  • C. Neutralize microbial toxins
  • D. Stabilize the disinfectant solution
Q. What is the role of T helper cells in the immune response?
  • A. To kill infected cells
  • B. To produce antibodies
  • C. To activate B cells and cytotoxic T cells
  • D. To phagocytize pathogens
Q. What is the role of the microbiome in human health?
  • A. It causes diseases.
  • B. It has no significant role.
  • C. It aids in digestion and immune function.
  • D. It only affects skin health.
Q. What is the typical antibody concentration in serum after a secondary immune response compared to a primary response?
  • A. Lower
  • B. Similar
  • C. Higher
  • D. No antibodies produced
Q. What laboratory technique is commonly used to identify bacterial species based on their cell wall characteristics?
  • A. PCR
  • B. Gram staining
  • C. ELISA
  • D. Western blotting
Q. What laboratory test is commonly used to diagnose streptococcal pharyngitis?
  • A. Blood culture
  • B. Rapid antigen test
  • C. PCR test
  • D. Urinalysis
Q. What role do T helper cells play in the immune response?
  • A. Directly kill infected cells
  • B. Help activate B cells and cytotoxic T cells
  • C. Produce antibodies
  • D. Engulf and digest pathogens
Q. What type of cells are primarily involved in the cell-mediated immune response?
  • A. B cells
  • B. Cytotoxic T cells
  • C. Antigen-presenting cells
  • D. Plasma cells
Q. What type of immune response is primarily involved in fighting viral infections?
  • A. Humoral response
  • B. Cell-mediated response
  • C. Innate response
  • D. Inflammatory response
Q. What type of immunity is conferred by maternal antibodies transferred to a newborn?
  • A. Active immunity
  • B. Passive immunity
  • C. Innate immunity
  • D. Cell-mediated immunity
Q. What type of immunity is provided by vaccination?
  • A. Innate immunity
  • B. Passive immunity
  • C. Active immunity
  • D. Cell-mediated immunity
Q. What type of pathogen is Candida albicans?
  • A. Bacterium
  • B. Virus
  • C. Fungus
  • D. Protozoan
Q. What type of vaccine is the MMR vaccine?
  • A. Inactivated
  • B. Live attenuated
  • C. Subunit
  • D. Toxoid
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