BIO105 UMASS AMHERST FINAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+
Mouse studies have informed us about the impact of the maternal
microbiome on the fetus. Choose all correct statements related to these
mouse studies.
-external factors impact maternal microbiome,
-maternal microbiome shapes the repertoire of commensal targeting
antibodies, which cross the placenta,
-SCFA's produced by mom's microbiome are transferred to the fetus,
-SCFAs produced by mom's microbiome impact the development of the
fetal organs Ans✓✓✓external factors impact maternal microbiome,
maternal microbiome shapes the repertoire of commensal targeting
antibodies, which cross the placenta,
SCFA's produced by mom's microbiome are transferred to the fetus,
SCFAs produced by mom's microbiome impact the development of the
fetal organs
One of the primary functions of the vaginal microbiome for the host is
protective. Identify ALL of the major ways in which this microbiome
accomplishes the protection.
-Attaching to epithelial cells to prevent pathogen access
-Producing lactose to inhibit viruses
-Producing antimicrobials
,-Producing hydrogen peroxide to damage host epithelial cells
-Producing lactic acid Ans✓✓✓Producing lactic acid, Producing
antimicrobials, Attaching to epithelial cells to prevent pathogen access
True or False Fecal microbiome transplant therapy has been approved to
treat C. diff infections, major depression disorder and autism spectrum
Ans✓✓✓False
TRUE OR FALSE Lactobacillus levels are regulated principally by the
hosts diet. Ans✓✓✓False
TRUE OR FALSE C-section newborns have gut microbiomes that
resemble momʼs skin microbiome and have elevated levels of hospital
microbes, while vaginal birth babies have microbiomes that resemble
primarily the mothers gut. Ans✓✓✓True
Which of the following are factors known to impact a baby's
microbiome development?
-placenta
-breastfeeding
-siblings diet
-furry pets
-mode of birth Ans✓✓✓placenta, mode of birth, breastfeeding, furry
pets
, True or False. The innate immune system is the bodyʼs first line of
defense. It is present at birth and lasts a lifetime. Ans✓✓✓True
Match each term with the most appropriate definition.
Adaptive immune system
Innate immune system
Helper T-cells
B-cells Ans✓✓✓Adaptive immune system → Develops over time as it
learns to respond to specific pathogens. Composed of B cells and T cells
- the special forces of the immune
system.,
Innate immune system → The bodyʼs first line of defense. Present at
birth and lasts a lifetime.,
Helper T-cells → stimulate B-cells to make antibodies and help killer
cells develop.,
B-cells → A type of white blood cell that makes antibodies
TRUE or FALSE Breastmilk has over 200 oligosaccharides that cannot
be digested by humans and require microbes to ferment. Ans✓✓✓True
Which of the following statements about the importance of breastmilk to
the developing microbiome is incorrect.
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+
Mouse studies have informed us about the impact of the maternal
microbiome on the fetus. Choose all correct statements related to these
mouse studies.
-external factors impact maternal microbiome,
-maternal microbiome shapes the repertoire of commensal targeting
antibodies, which cross the placenta,
-SCFA's produced by mom's microbiome are transferred to the fetus,
-SCFAs produced by mom's microbiome impact the development of the
fetal organs Ans✓✓✓external factors impact maternal microbiome,
maternal microbiome shapes the repertoire of commensal targeting
antibodies, which cross the placenta,
SCFA's produced by mom's microbiome are transferred to the fetus,
SCFAs produced by mom's microbiome impact the development of the
fetal organs
One of the primary functions of the vaginal microbiome for the host is
protective. Identify ALL of the major ways in which this microbiome
accomplishes the protection.
-Attaching to epithelial cells to prevent pathogen access
-Producing lactose to inhibit viruses
-Producing antimicrobials
,-Producing hydrogen peroxide to damage host epithelial cells
-Producing lactic acid Ans✓✓✓Producing lactic acid, Producing
antimicrobials, Attaching to epithelial cells to prevent pathogen access
True or False Fecal microbiome transplant therapy has been approved to
treat C. diff infections, major depression disorder and autism spectrum
Ans✓✓✓False
TRUE OR FALSE Lactobacillus levels are regulated principally by the
hosts diet. Ans✓✓✓False
TRUE OR FALSE C-section newborns have gut microbiomes that
resemble momʼs skin microbiome and have elevated levels of hospital
microbes, while vaginal birth babies have microbiomes that resemble
primarily the mothers gut. Ans✓✓✓True
Which of the following are factors known to impact a baby's
microbiome development?
-placenta
-breastfeeding
-siblings diet
-furry pets
-mode of birth Ans✓✓✓placenta, mode of birth, breastfeeding, furry
pets
, True or False. The innate immune system is the bodyʼs first line of
defense. It is present at birth and lasts a lifetime. Ans✓✓✓True
Match each term with the most appropriate definition.
Adaptive immune system
Innate immune system
Helper T-cells
B-cells Ans✓✓✓Adaptive immune system → Develops over time as it
learns to respond to specific pathogens. Composed of B cells and T cells
- the special forces of the immune
system.,
Innate immune system → The bodyʼs first line of defense. Present at
birth and lasts a lifetime.,
Helper T-cells → stimulate B-cells to make antibodies and help killer
cells develop.,
B-cells → A type of white blood cell that makes antibodies
TRUE or FALSE Breastmilk has over 200 oligosaccharides that cannot
be digested by humans and require microbes to ferment. Ans✓✓✓True
Which of the following statements about the importance of breastmilk to
the developing microbiome is incorrect.
