BIOL 2420 FINAL (exam 1) PRACTICE QUESTIONS AND CORRECT ANSWERS
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Course
BIO 2420
Institution
BIO 2420
e. smog production Microorganisms are involved in each of the following processes EXCEPT: a. infection b. decomposition of organic material c. oxygen production d. food production e. smog production
e. using a sterile liquid and eliminating exposure to microorganisms If you were setting up an expe...
BIOL 2420 FINAL (exam 1) PRACTICE
QUESTIONS AND CORRECT ANSWERS
e. smog production ✅Microorganisms are involved in each of the following processes
EXCEPT:
a. infection
b. decomposition of organic material
c. oxygen production
d. food production
e. smog production
e. using a sterile liquid and eliminating exposure to microorganisms ✅If you were
setting up an experiment to disprove spontaneous in a liquid medium, which of the
following would be essential to the experiment?
a. placing decaying meat in the liquid
b. starting with a liquid that contains microorganisms
c. adding antibiotics to the liquid
d. adding carbon dioxide to the liquid
e. using a sterile liquid and eliminating exposure to microorganisms
a. Edward Jenner for the prevention of small pox ✅Credit for the first vaccine for the
prevention of human disease is generally given to:
a. Edward Jenner for the prevention of small pox
b. Louis Pasteur for the prevention of rabies
c. Louis Pasteur for the prevention of anthrax
d. Robert Koch for the prevention of tuberculosis
a. Pasteur ✅Who of the following provided the evidence needed to discredit the
concept on spontaneous generation?
a. Pasteur
b. Koch
c. Semmelweiss
d. Lister
c. van Leewenhoek ✅Who of the following was the first to observe and accurately
describe microorganisms?
a. Pasteur
b. Lister
c. van Leewenhoek
d. Tyndall
b. germ theory ✅The concept that human and animal disease are caused by
microorganisms is called the
a. cell theory
, b. germ theory
c. causative theory
d. disease theory
b. Koch ✅Who of the following developed a set criteria that could be used to establish
a causative link between a particular microorganism and a particular disease?
a. Fracastoro
b. Koch
c. Pasteur
d. Lister
d. 600x ✅A 30x objective and a 20x ocular produce a total magnification of
a. 230x
b. 320x
c. 50x
d. 600x
c. optical density and refractive index ✅Immersion oil is used with some microscopic
lenses because it has the same ______ as glass.
a. optical density
b. refractive index
c. optical density and refractive index
d. neither optical density or refractive index
c. spirochetes ✅Bacteria that are shaped like flexible helices are
a. vibrios
b. spirilla
c. spirochetes
d. coccobacilli
c. crystal violet ✅In the Gram-staining procedure, the mordant is
a. iodine
b. safranin
c. crystal violet
d. alcohol
b. have multiple layers of peptidoglycan that help retain the crystal violet stain ✅Gram
positive cells
a. have a second, outer membrane that helps retain the crystal violet stain
b. have multiple layers of peptidoglycan that help retain the crystal violet stain
c. have a thick capsule that traps the crystal violet stain
d. have a periplasmic space that traps the crystal violet.
c. blue; pink ✅After the secondary stain has been added, gram-positive organisms are
stained _____ and gram-negative organisms are stained ______.
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