ASU MIC 205 EXAM 1 COMPLETE 140
QUESTIONS WITH VERIFIED ANSWERS
1. Which of the following is a true statement concerning bacteria and archaea?
• A) Both bacteria and archaea are known to cause human diseases
• B) Archaea are more pathogenic to humans than bacteria
• C) While some bacteria are pathogenic to humans, no archaea are known to
cause human diseases
• D) Neither bacteria nor archaea cause human diseases
Correct Answer: C ✓
2. What was Leeuwenhoek's contribution to the science of microbiology?
• A) He disproved spontaneous generation
• B) He developed the first microscope
• C) He discovered antibiotics
• D) He established Koch's postulates
Correct Answer: B ✓
3. Characteristic of bacteria:
• A) Have cell walls that contain peptidoglycan
• B) Have cell walls made of chitin
• C) Are always multicellular
• D) Contain a nucleus
,Correct Answer: A ✓
Additional correct statements about bacteria:
• Derive nutrition from organic or inorganic sources or conduct
photosynthesis ✓
4. Characteristic of archaea:
• A) Typically associated with human disease
• B) Found in extreme environments
• C) Have peptidoglycan in cell walls
• D) Are always photosynthetic
Correct Answer: B ✓
Additional correct statements about archaea:
• Not typically associated with human disease ✓
5. Characteristic of fungi:
• A) Prokaryotic
• B) Eukaryotic
• C) Always multicellular
• D) Have peptidoglycan cell walls
Correct Answer: B ✓
Additional correct statement:
• Can be unicellular or multicellular ✓
,6. Characteristic of viruses:
• A) Can reproduce outside a host cell
• B) Are visible with a light microscope
• C) Can be seen only with an electron microscope
• D) Are prokaryotic
Correct Answer: C ✓
Additional correct statement:
• Cannot reproduce outside a host cell ✓
7. One of the first set of experiments to refute spontaneous generation was
done in 1688 by Francesco Redi. Which of the following statements regarding
Francesco Redi's experiments is true?
• A) He used S-shaped flasks to prevent microbial growth
• B) The results of his experiment demonstrated that living organisms are
derived from other living organisms
• C) He proved that microorganisms arise spontaneously
• D) He discovered that heat sterilization prevents microbial growth
Correct Answer: B ✓
8. In 1861, Pasteur conducted his now-famous experiments using flasks with
long necks bent into an S-shape. Imagine that you are a scientist working in
Pasteur's lab at this time. You decide to tip the flasks so that broth enters the
long S-shaped neck. You then return the flask to its upright position. Predict the
most likely outcome of tipping one of Pasteur's S-necked flasks.
• A) The broth would remain sterile because the neck traps microbes
, • B) The broth would become contaminated with microbes because they
were trapped in the neck
• C) The broth would spontaneously generate new microbes
• D) The broth would become sterile due to exposure to air
Correct Answer: B ✓
9. S. aureus has been isolated from George's infected wound. To satisfy Koch's
postulates, what would George's doctor need to do with the isolated S. aureus?
• A) Treat the infection with antibiotics
• B) Inject the S. aureus into an animal, observe whether the animal gets an
infection similar to George's, and isolate the same strain of S. aureus from
the infection
• C) Identify the bacteria under a microscope
• D) Determine if the bacteria are Gram-positive or Gram-negative
Correct Answer: B ✓
10. Which of the following are limitations of antibiotics? (Select all that apply)
• A) Antibiotics are effective against all types of infections
• B) Antibiotics are not effective in treating viral infections
• C) Treatment with antibiotics can lead to the emergence of resistant strains
• D) Antibiotics may be toxic
Correct Answers: B, C, D ✓
QUESTIONS WITH VERIFIED ANSWERS
1. Which of the following is a true statement concerning bacteria and archaea?
• A) Both bacteria and archaea are known to cause human diseases
• B) Archaea are more pathogenic to humans than bacteria
• C) While some bacteria are pathogenic to humans, no archaea are known to
cause human diseases
• D) Neither bacteria nor archaea cause human diseases
Correct Answer: C ✓
2. What was Leeuwenhoek's contribution to the science of microbiology?
• A) He disproved spontaneous generation
• B) He developed the first microscope
• C) He discovered antibiotics
• D) He established Koch's postulates
Correct Answer: B ✓
3. Characteristic of bacteria:
• A) Have cell walls that contain peptidoglycan
• B) Have cell walls made of chitin
• C) Are always multicellular
• D) Contain a nucleus
,Correct Answer: A ✓
Additional correct statements about bacteria:
• Derive nutrition from organic or inorganic sources or conduct
photosynthesis ✓
4. Characteristic of archaea:
• A) Typically associated with human disease
• B) Found in extreme environments
• C) Have peptidoglycan in cell walls
• D) Are always photosynthetic
Correct Answer: B ✓
Additional correct statements about archaea:
• Not typically associated with human disease ✓
5. Characteristic of fungi:
• A) Prokaryotic
• B) Eukaryotic
• C) Always multicellular
• D) Have peptidoglycan cell walls
Correct Answer: B ✓
Additional correct statement:
• Can be unicellular or multicellular ✓
,6. Characteristic of viruses:
• A) Can reproduce outside a host cell
• B) Are visible with a light microscope
• C) Can be seen only with an electron microscope
• D) Are prokaryotic
Correct Answer: C ✓
Additional correct statement:
• Cannot reproduce outside a host cell ✓
7. One of the first set of experiments to refute spontaneous generation was
done in 1688 by Francesco Redi. Which of the following statements regarding
Francesco Redi's experiments is true?
• A) He used S-shaped flasks to prevent microbial growth
• B) The results of his experiment demonstrated that living organisms are
derived from other living organisms
• C) He proved that microorganisms arise spontaneously
• D) He discovered that heat sterilization prevents microbial growth
Correct Answer: B ✓
8. In 1861, Pasteur conducted his now-famous experiments using flasks with
long necks bent into an S-shape. Imagine that you are a scientist working in
Pasteur's lab at this time. You decide to tip the flasks so that broth enters the
long S-shaped neck. You then return the flask to its upright position. Predict the
most likely outcome of tipping one of Pasteur's S-necked flasks.
• A) The broth would remain sterile because the neck traps microbes
, • B) The broth would become contaminated with microbes because they
were trapped in the neck
• C) The broth would spontaneously generate new microbes
• D) The broth would become sterile due to exposure to air
Correct Answer: B ✓
9. S. aureus has been isolated from George's infected wound. To satisfy Koch's
postulates, what would George's doctor need to do with the isolated S. aureus?
• A) Treat the infection with antibiotics
• B) Inject the S. aureus into an animal, observe whether the animal gets an
infection similar to George's, and isolate the same strain of S. aureus from
the infection
• C) Identify the bacteria under a microscope
• D) Determine if the bacteria are Gram-positive or Gram-negative
Correct Answer: B ✓
10. Which of the following are limitations of antibiotics? (Select all that apply)
• A) Antibiotics are effective against all types of infections
• B) Antibiotics are not effective in treating viral infections
• C) Treatment with antibiotics can lead to the emergence of resistant strains
• D) Antibiotics may be toxic
Correct Answers: B, C, D ✓
