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BIOL 250 Bacteriology Exam 1 well answered already passed
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BIOL 250 Bacteriology Exam 1 well answered already passed
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BIOL 250 Bacteriology Exam 1 wellanswered already passed
Antoni van Leeuwenhoek was the first person in history to - correct answer ✔✔view microorganisms
and record these observations
Which of the following statements best describes the major differences between prokaryotes and
eukaryotes? - correct answer ✔✔Eukaryotic cells have a membrane-bound nucleus; prokaryotic cells do
not
Which of the following is an INCORRECT pairing?
protozoa-multicellular
fungi-cell walls
algae-aquatic and marine habitats
prokaryotes-no nuclei
viruses-acellular parsites - correct answer ✔✔protozoa-multicellular
Which of the following statements concerning the characteristics of life is FLASE?
reproduction can occur asexually or sexually in living things
reproduction is defined as an increase in the size of an organism
viruses have some, but not all, of the characteristics of living things
organisms may not exhibit all of the characteristics of life at all times
living things store metabolic energy in the form of chemicals such as ATP - correct answer
✔✔reproduction is defined as an increase in the size of an organism
Which of the following is NOT a characteristic of viruses?
they are obligatory parasites
they are visible with a light microscope
they are typically smaller than prokaryotic cells
, they are composed of genetic material and protein - correct answer ✔✔they are visible with a light
microscope
Carl Woese and collaborators identified two major branches of prokaryotic evolution. What was the
basis for dividing prokaryotes into two domains? - correct answer ✔✔genetic characteristics such as
ribosomal RNA sequence
Which of the following phylogenetic trees correctly depicts the Tree of Life - correct answer ✔✔Bacteria
Archaea
Eukarya
If you were setting up an experiment to disprove spontaneous generation in a liquid medium, which of
the following would be essential to the experiment? - correct answer ✔✔using a sterile liquid and
eliminating exposure to microorganisms
Which fo the following was NOT an aspect of Pasteur's experiments to disprove spontaneous
generation?
the necks of the flasks he used were bent into an S-shape
he boiled the infusions to kill any microbes present
the flasks were incubated for a very long periods of time
the flasks were free of microbes until they were open
the flaks he used were sealed with corks - correct answer ✔✔The flasks he used were sealed with corks
Pasteur observed that bacteria and yeasts ferment grape juice, the bacteria producing acid and the yeast
cells producing alcohol. Based on his results, Pasteur reasoned which of the following applications? -
correct answer ✔✔boiling the grape juice long enough to kill anaerobic bacteria and then adding yeasts
to the grape juice would allow for the desired fermentation products
What is the correct order for the application of Koch's postulates?
I. Inoculate suspect and observe that subject develops disease of interest
II. Isolate and culture suspect agent in the laboratory
III. Find suspect agent in every case of disease of interest but not in healthy hosts
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