Microbio 303 Exam test questions
and answers graded A+
Microbes affect our health by helping in...?
a. Nutrient and fluid uptake
b. Tolerance to food allergens
c. Protection against food pathogens
d. All of the above - ANS✅✅d. all of the above
1. Where on the human body might you find methanogens, besides in the large intestines?
A. On the skin
B. in the mouth
C. in the respiratory tract
D. nowhere besides the large intestines - ANS✅✅B. in the mouth
Overweight and obese individuals who lose weight often struggle with weight regain. After weight
loss, they will burn fewer calories. This in part has to do with...
A. A return to their bad diet habits
B. A change in their microbiome where the microbiome no longer consumes dietary flavonoids
C. A change in their microbiome where the microbiome consumes dietary flavonoids
D. A decrease in microbiome diversity and an increase in metabolism of complex carbohydrates -
ANS✅✅C. A change in their microbiome where the microbiome consumes dietary flavonoids
• A type of anaerobic respiration
• Hydrogen most common electron donors
• Electron acceptor (carbon dioxide, formate, alcohols, methylamines, methanol, acetate) is reduced
to methane
• Unique set of C1 carriers and electron carriers (e.g. F420)
• Electron transfer generates PMF or NaMF, used to make ATP via ATP synthase -
ANS✅✅Methanogenesis
, A unique electron carrier in methanogens is
A.F420
B. NADH
C. Methanopterin
D. Chlorophyl - ANS✅✅A.F420
Acetogens compete with methanogens for hydrogen gas and carbon dioxide. However, instead of
making methane they make
A.Methanol
B. Ethanol
C. Acetate
D. Glucose - ANS✅✅C. Acetate
All other things being equal, acetogens will out compete methanogens in an environment
True
False - ANS✅✅False
Insects are often dependent upon primary symbionts. These bacteria provide ___________ to the
host. - ANS✅✅vitamins and amino acids
Akkermansia sp. contribute positively to the health of a host. Which one of the following conditions
correlates with a lack of this microbe in the intestines. - ANS✅✅
2. What electron donors cannot pair with carbon dioxide as a terminal electron acceptor?
A. H2S
B. H2
C. Fe2+ (free iron)
D. They all would work - ANS✅✅C. Fe2+ (free iron)
it is way below co2
• Anaerobic bacteria, most are Firmicutes
and answers graded A+
Microbes affect our health by helping in...?
a. Nutrient and fluid uptake
b. Tolerance to food allergens
c. Protection against food pathogens
d. All of the above - ANS✅✅d. all of the above
1. Where on the human body might you find methanogens, besides in the large intestines?
A. On the skin
B. in the mouth
C. in the respiratory tract
D. nowhere besides the large intestines - ANS✅✅B. in the mouth
Overweight and obese individuals who lose weight often struggle with weight regain. After weight
loss, they will burn fewer calories. This in part has to do with...
A. A return to their bad diet habits
B. A change in their microbiome where the microbiome no longer consumes dietary flavonoids
C. A change in their microbiome where the microbiome consumes dietary flavonoids
D. A decrease in microbiome diversity and an increase in metabolism of complex carbohydrates -
ANS✅✅C. A change in their microbiome where the microbiome consumes dietary flavonoids
• A type of anaerobic respiration
• Hydrogen most common electron donors
• Electron acceptor (carbon dioxide, formate, alcohols, methylamines, methanol, acetate) is reduced
to methane
• Unique set of C1 carriers and electron carriers (e.g. F420)
• Electron transfer generates PMF or NaMF, used to make ATP via ATP synthase -
ANS✅✅Methanogenesis
, A unique electron carrier in methanogens is
A.F420
B. NADH
C. Methanopterin
D. Chlorophyl - ANS✅✅A.F420
Acetogens compete with methanogens for hydrogen gas and carbon dioxide. However, instead of
making methane they make
A.Methanol
B. Ethanol
C. Acetate
D. Glucose - ANS✅✅C. Acetate
All other things being equal, acetogens will out compete methanogens in an environment
True
False - ANS✅✅False
Insects are often dependent upon primary symbionts. These bacteria provide ___________ to the
host. - ANS✅✅vitamins and amino acids
Akkermansia sp. contribute positively to the health of a host. Which one of the following conditions
correlates with a lack of this microbe in the intestines. - ANS✅✅
2. What electron donors cannot pair with carbon dioxide as a terminal electron acceptor?
A. H2S
B. H2
C. Fe2+ (free iron)
D. They all would work - ANS✅✅C. Fe2+ (free iron)
it is way below co2
• Anaerobic bacteria, most are Firmicutes
