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MIC 205 Exam 1 - Daydif ASU – 140 Q’S AND A’S
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MIC 205 Exam 1 - Daydif ASU – 140 Q’S ANDA’S
Which of the following is a true statement concerning bacteria and archaea?
- - While some bacteria are pathogenic to humans, no archaea are known to
cause human diseases
- What was Leeuwenhoek's contribution to the science of microbiology? - -
He developed the first microscope.
- characteristic of bacteria - - Have cell walls that contain peptidoglycan
Derive nutrition from organic or inorganic sources or conduct photosynthesis
- characteristic of archaea - - Not typically associated with human disease
Found in extreme environments
- characteristic of fungi - - Eukaryotic
Can be unicellular or multicellular
- characteristic of viruses - - Can be seen only with an electron microscope
Cannot reproduce outside a host cell
- 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? - - The results of his
experiment demonstrated that living organisms are derived from other living
organisms.
- 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. - - The
broth would become contaminated with microbes because they were trapped
in the neck.
- 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? - - 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.
, - Which of the following are limitations of antibiotics? - - Antibiotics are not
effective in treating viral infections.
Treatment with antibiotics can lead to the emergence of resistant strains.
Antibiotics may be toxic.
- Further characterization of the S. aureus isolated from George's wound
reveals that the strain is MRSA. Why is George's doctor concerned that MRSA
has been identified as the causative agent of George's infection? - - MRSA is
transmissible.
- Some scientists are studying a newly discovered microbe and determine
that it consists of a single cell, lacking a nucleus. This organism could be - -
a bacterium.
- Which of the following always reproduce inside a host cell? - - Viruses
- Which microbes are most similar to animals in their nutritional needs and
cellular structure? - - Protozoa
- Which type of microorganism is most like molds in its nutritional needs and
cellular structure? - - Yeasts
- All eukaryotic cells contain most of their genetic material inside what
structure? - - A nucleus
- Which of the following is NOT a characteristic of viruses? - - They are
visible with a light microscope.
- Whose experiments supported the existence of a "life force" that causes
inanimate matter to spontaneously come to life? - - Needham
- Which of the following are paired INCORRECTLY? - - Gram: cholera
- Put the following steps of Koch's postulates in order: a. The suspected
infectious agent must be isolated and grown outside the host. b. The
suspected infectious agent causes the disease when it is introduced to a
healthy, experimental host. c. The suspected infectious agent must be found
in every case of the disease. d. The suspected infectious agent must be
found in the diseased experimental host. - - c, a, b, d
- Which health care practitioner improved our understanding of the
importance of hand washing? - - Ignaz Semmelweis
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