BIO 112 EXAM 2 QUESTIONS AND
ANSWERS
All of the following are true about SARS-CoV-2 infection EXCEPT: - Correct Answers -
The new virions stay within the host cell and do not leave
If each of the following prokaryotes were to possess a cell wall, which one of these will
most likely be resistant to plasmolysis in hypertonic environments? - Correct Answers -
extreme halophiles
SARS-CoV-2 spreads via
A. respiratory droplets
B. aerosols or droplet nuclei
C. fomite (infected surfaces)
D. All of the above (A, B, & C)
E. Only A & C - Correct Answers -D. All of the above (A, B, & C)
Which of the following represent functions of the bacterial capsule? - Correct Answers -
all of these are functions associated with the capsule
The diplomonad Giardia and the parabasalid Trichomonas have all in common except: -
Correct Answers -two equal sized nuclei
Which of the following DOES NOT describe SARS-CoV-2? - Correct Answers -Its DNA
is replicated in the host
The devolution or regression hypothesis of the evolution of virsuses suggests that: -
Correct Answers -Viruses evolved from more complex free-living organisms that lost
genetic material as they adapted to a parasitic lifestyle.
Which of the following prokaryotic structures is INCORRECTLY paired with a function or
effect? - Correct Answers -endospore - toxic outer membrane components of some
disease-causing bacteria
Protists are very important economically, environmentally, biologically, and medicinally.
Which of the following can protists NOT do? - Correct Answers -Form a monophyletic
group.
, Escherichia coli (E. coli) is a gamma proteobacteria that is found in and on your body.
Which of the following is NOT true about this microorganism? - Correct Answers -It can
convert nitrogen to ammonia.
Many antibiotics work by inhibiting the synthesis of peptidoglycan, a component of the
bacterial cell wall. What is a possible mechanism of action for anti-fungal drugs? -
Correct Answers -inhibiting the synthesis of chitin in fungi
You are given three test tubes, each containing an unknown protist, and your task is to
read the following description and match these four protists to the correct test tube.
When light, especially red and blue light, is shone on the tubes, oxygen bubbles
accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1
indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis
of test tube 2 indicates the presence of substantial amounts of silica. Microscopic
analysis of organisms in test tubes 1 and 3 reveals the presence of permanent,
membrane-bounded sacs just under the plasma membrane. Further microscopic
analysis of the contents in test tube 3 reveals the presence of one large nucleus and
one small nucleus in each organism. - Correct Answers -Paramecium
Which of the following statements about scientific models is false: - Correct Answers -
they precisely predict what will happen given available information and reasonable
assumptions
A particular species of protist has obtained a chloroplast via secondary endosymbiosis.
You know this because the chloroplasts ________. - Correct Answers -have three or
four membranes
Archaeans and bacteria differ in all of the following traits except - Correct Answers -
presence of circular chromosome
Which of the following terms is INCORRECTLY defined? - Correct Answers -gram
positive bacterium - prokaryote that has an outer membrane external to the
peptidoglycan layer and therefore stains pink with Gram stain
Which of the following statements about Bacteria is FALSE? - Correct Answers -oxygen
is necessary for the growth of all bacteria
A gardener applies a specific fungicide to her plot that kills all mycorrhizal fungi. Given
what you have learnt about Arbuscular mycorrhizae(AM) and its role, answer the
following.
Which of the graphs below depicts changes in the amount of phosphorus in the soil
after application of the fungicide? - Correct Answers -A (graph that slopes upwards,
positive)
ANSWERS
All of the following are true about SARS-CoV-2 infection EXCEPT: - Correct Answers -
The new virions stay within the host cell and do not leave
If each of the following prokaryotes were to possess a cell wall, which one of these will
most likely be resistant to plasmolysis in hypertonic environments? - Correct Answers -
extreme halophiles
SARS-CoV-2 spreads via
A. respiratory droplets
B. aerosols or droplet nuclei
C. fomite (infected surfaces)
D. All of the above (A, B, & C)
E. Only A & C - Correct Answers -D. All of the above (A, B, & C)
Which of the following represent functions of the bacterial capsule? - Correct Answers -
all of these are functions associated with the capsule
The diplomonad Giardia and the parabasalid Trichomonas have all in common except: -
Correct Answers -two equal sized nuclei
Which of the following DOES NOT describe SARS-CoV-2? - Correct Answers -Its DNA
is replicated in the host
The devolution or regression hypothesis of the evolution of virsuses suggests that: -
Correct Answers -Viruses evolved from more complex free-living organisms that lost
genetic material as they adapted to a parasitic lifestyle.
Which of the following prokaryotic structures is INCORRECTLY paired with a function or
effect? - Correct Answers -endospore - toxic outer membrane components of some
disease-causing bacteria
Protists are very important economically, environmentally, biologically, and medicinally.
Which of the following can protists NOT do? - Correct Answers -Form a monophyletic
group.
, Escherichia coli (E. coli) is a gamma proteobacteria that is found in and on your body.
Which of the following is NOT true about this microorganism? - Correct Answers -It can
convert nitrogen to ammonia.
Many antibiotics work by inhibiting the synthesis of peptidoglycan, a component of the
bacterial cell wall. What is a possible mechanism of action for anti-fungal drugs? -
Correct Answers -inhibiting the synthesis of chitin in fungi
You are given three test tubes, each containing an unknown protist, and your task is to
read the following description and match these four protists to the correct test tube.
When light, especially red and blue light, is shone on the tubes, oxygen bubbles
accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1
indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis
of test tube 2 indicates the presence of substantial amounts of silica. Microscopic
analysis of organisms in test tubes 1 and 3 reveals the presence of permanent,
membrane-bounded sacs just under the plasma membrane. Further microscopic
analysis of the contents in test tube 3 reveals the presence of one large nucleus and
one small nucleus in each organism. - Correct Answers -Paramecium
Which of the following statements about scientific models is false: - Correct Answers -
they precisely predict what will happen given available information and reasonable
assumptions
A particular species of protist has obtained a chloroplast via secondary endosymbiosis.
You know this because the chloroplasts ________. - Correct Answers -have three or
four membranes
Archaeans and bacteria differ in all of the following traits except - Correct Answers -
presence of circular chromosome
Which of the following terms is INCORRECTLY defined? - Correct Answers -gram
positive bacterium - prokaryote that has an outer membrane external to the
peptidoglycan layer and therefore stains pink with Gram stain
Which of the following statements about Bacteria is FALSE? - Correct Answers -oxygen
is necessary for the growth of all bacteria
A gardener applies a specific fungicide to her plot that kills all mycorrhizal fungi. Given
what you have learnt about Arbuscular mycorrhizae(AM) and its role, answer the
following.
Which of the graphs below depicts changes in the amount of phosphorus in the soil
after application of the fungicide? - Correct Answers -A (graph that slopes upwards,
positive)
