MICROBIOLOGY AND IMMUNOLOGY
ACTUAL EXAM FULL QUESTIONS AND
CORRECT ANSWERS GRADED A PLUS
●● Infection
Answer: The invasion and multiplication of pathogens in the host's body,
which may lead to disease.
●● Disease
Answer: A condition that results from infection, characterized by
specific symptoms and signs.
●● Normal microbiota
Answer: Microorganisms that reside in the human body without causing
disease and can be beneficial.
●● Microbiome research
Answer: The study of the collective genomes of the microorganisms in a
particular environment, particularly the human body.
●● Factors influencing microbiota
Answer: Diet, age, environment, genetics, and lifestyle can all affect the
composition of an individual's microbiota.
, ●● Functions of microbiota
Answer: They aid in digestion, produce vitamins, protect against
pathogens, and modulate the immune system.
●● Portals of entry
Answer: Routes through which pathogens enter the body, such as
mucous membranes, skin, and respiratory tract.
●● Portals of exit
Answer: Routes through which pathogens leave the body, including
respiratory droplets, blood, and bodily fluids.
●● Microbial adherence
Answer: The process by which microbes attach to host cells, often using
specialized structures like fimbriae.
●● Capsules and pathogenicity
Answer: Capsules protect bacteria from phagocytosis, enhancing their
ability to cause disease.
●● Steps to cause disease
Answer: 1. Entry, 2. Adherence, 3. Invasion, 4. Evasion of host defenses,
5. Damage to host.
ACTUAL EXAM FULL QUESTIONS AND
CORRECT ANSWERS GRADED A PLUS
●● Infection
Answer: The invasion and multiplication of pathogens in the host's body,
which may lead to disease.
●● Disease
Answer: A condition that results from infection, characterized by
specific symptoms and signs.
●● Normal microbiota
Answer: Microorganisms that reside in the human body without causing
disease and can be beneficial.
●● Microbiome research
Answer: The study of the collective genomes of the microorganisms in a
particular environment, particularly the human body.
●● Factors influencing microbiota
Answer: Diet, age, environment, genetics, and lifestyle can all affect the
composition of an individual's microbiota.
, ●● Functions of microbiota
Answer: They aid in digestion, produce vitamins, protect against
pathogens, and modulate the immune system.
●● Portals of entry
Answer: Routes through which pathogens enter the body, such as
mucous membranes, skin, and respiratory tract.
●● Portals of exit
Answer: Routes through which pathogens leave the body, including
respiratory droplets, blood, and bodily fluids.
●● Microbial adherence
Answer: The process by which microbes attach to host cells, often using
specialized structures like fimbriae.
●● Capsules and pathogenicity
Answer: Capsules protect bacteria from phagocytosis, enhancing their
ability to cause disease.
●● Steps to cause disease
Answer: 1. Entry, 2. Adherence, 3. Invasion, 4. Evasion of host defenses,
5. Damage to host.
