Microbiology Test 3 Questions
2026 Exam All Answers and
Illustrations Given
The child gut microbiota resembles the adult microbiota
A) by 1 month of age.
B) around age 3.
C) around age 15.
D) by 12 months of age. - 🧠 ANSWER ✔✔B) around age 3.
,A woman mentions to her physician during a prenatal check-up that she
plans to clean her house from "top-to-bottom" before the baby arrives, and
intends to protect her newborn from as many "germs" as possible to
prevent any possible infections. If you were the physician, how would you
advise this patient?
A) Too much cleanliness can be a bad thing for an infant, as the bacteria
they acquire at an early age help to "train" the immune system to correctly
recognize pathogens but not attack beneficial bacteria in the body.
Attacking the "normal" bacteria and nonharmful substances can cause too
much inflammation, allergies, or asthma later in life.
B) The patient's plan is a good one. You never know when the infant might
encounter a serious pathogen. Since infants do not have a well-developed
immune system yet, pathogens can be very dangerous. She should
disinfect all surfaces in her home daily.
C) Her plan is a good one, - 🧠 ANSWER ✔✔A) Too much cleanliness can
be a bad thing for an infant, as the bacteria they acquire at an early age
help to "train" the immune system to correctly recognize pathogens but not
attack beneficial bacteria in the body. Attacking the "normal" bacteria and
,nonharmful substances can cause too much inflammation, allergies, or
asthma later in life.
The human oral microbiota consists of
A) monoculture biofilms on tooth surfaces.
B) a small group of phylogenetically related aerobic microorganisms.
C) the same phyla that are found in the human gut.
D) diverse aerobic and anaerobic microorganisms. - 🧠 ANSWER ✔✔D)
diverse aerobic and anaerobic microorganisms.
Obligate anaerobes are likely to be found in the __________.
A) urogenital tract
B) mouth
C) colon
D) nasal cavity - 🧠 ANSWER ✔✔C) colon
Which of the following is NOT a function of the human gut microbiome?
A) maturation of the gastrointestinal tract
B) iron and trace metal absorption
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, C) production of volatile fatty acids from polysaccharides
D) production of essential amino acids and vitamins - 🧠 ANSWER ✔✔B)
iron and trace metal absorption
The presence of microbes in the bladder is __________.
A) more likely to occur in men than women
B) likely to lead to a UTI
C) used to prime the immune response
D) normal - 🧠 ANSWER ✔✔B) likely to lead to a UTI
Which of the following is NOT true of human gut microbes?
A) They help catabolize polysaccharides.
B) They are involved in the "maturing" of the digestive tract.
C) They produce and excrete amino acids.
D) The population size is low, but the diversity is high. - 🧠 ANSWER ✔✔D)
The population size is low, but the diversity is high.
Normal microbiota helps to ________ colonization of pathogenic
organisms.
2026 Exam All Answers and
Illustrations Given
The child gut microbiota resembles the adult microbiota
A) by 1 month of age.
B) around age 3.
C) around age 15.
D) by 12 months of age. - 🧠 ANSWER ✔✔B) around age 3.
,A woman mentions to her physician during a prenatal check-up that she
plans to clean her house from "top-to-bottom" before the baby arrives, and
intends to protect her newborn from as many "germs" as possible to
prevent any possible infections. If you were the physician, how would you
advise this patient?
A) Too much cleanliness can be a bad thing for an infant, as the bacteria
they acquire at an early age help to "train" the immune system to correctly
recognize pathogens but not attack beneficial bacteria in the body.
Attacking the "normal" bacteria and nonharmful substances can cause too
much inflammation, allergies, or asthma later in life.
B) The patient's plan is a good one. You never know when the infant might
encounter a serious pathogen. Since infants do not have a well-developed
immune system yet, pathogens can be very dangerous. She should
disinfect all surfaces in her home daily.
C) Her plan is a good one, - 🧠 ANSWER ✔✔A) Too much cleanliness can
be a bad thing for an infant, as the bacteria they acquire at an early age
help to "train" the immune system to correctly recognize pathogens but not
attack beneficial bacteria in the body. Attacking the "normal" bacteria and
,nonharmful substances can cause too much inflammation, allergies, or
asthma later in life.
The human oral microbiota consists of
A) monoculture biofilms on tooth surfaces.
B) a small group of phylogenetically related aerobic microorganisms.
C) the same phyla that are found in the human gut.
D) diverse aerobic and anaerobic microorganisms. - 🧠 ANSWER ✔✔D)
diverse aerobic and anaerobic microorganisms.
Obligate anaerobes are likely to be found in the __________.
A) urogenital tract
B) mouth
C) colon
D) nasal cavity - 🧠 ANSWER ✔✔C) colon
Which of the following is NOT a function of the human gut microbiome?
A) maturation of the gastrointestinal tract
B) iron and trace metal absorption
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, C) production of volatile fatty acids from polysaccharides
D) production of essential amino acids and vitamins - 🧠 ANSWER ✔✔B)
iron and trace metal absorption
The presence of microbes in the bladder is __________.
A) more likely to occur in men than women
B) likely to lead to a UTI
C) used to prime the immune response
D) normal - 🧠 ANSWER ✔✔B) likely to lead to a UTI
Which of the following is NOT true of human gut microbes?
A) They help catabolize polysaccharides.
B) They are involved in the "maturing" of the digestive tract.
C) They produce and excrete amino acids.
D) The population size is low, but the diversity is high. - 🧠 ANSWER ✔✔D)
The population size is low, but the diversity is high.
Normal microbiota helps to ________ colonization of pathogenic
organisms.
