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Microbiology FINAL Exam 1 Questions and Answers 100% Accurate
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Microbiology FINAL Exam 1
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Microbiology FINAL Exam 1The concept that human and animal diseases are caused by microorganisms is called
the...
a. cell theory
b. germ theory
c. causative theory
d. disease theory – answer b. germ theory
The concept that living organisms arise fro nonliving material is called...
a. biogenesis
b. cell theory
c. spontaneous generation
d. relativity – answer c. spontaneous generation
The most important innovation in Pasteur's 'swan neck flask' experiments was...
a. a glass barrier prevented contamination
b. heating media prevented microbial growth
c. fresh air could directly contact the medium
d. the experimenter could look for contamination without disturbig the experiment -
answerc. fresh air could directly contact the medium
In the name Staphylococcus aureus, aureus is the...
a. genus
b. domain name
c. species
d. kingdom
e. family name - answerc. species
A prokaryotic cell may possess each of the following cellular components except...
a. flagella
b. a nucleus
c. ribosomes
d. a cell wall - answerb. a nucleus
Which of the following is not a domain in the three-domain system?
a. animalia
b. archea
c. bacteria
d. eukarya - answera. animalia
Who is credited with the first observing microorganisms?
a. Robert Hooke
,b. Anton van Leeuwenhoek
c. Robert Koch
d. Louis Pasteur
e. Carolus Linnaeus - answerb. Anton van Leeuwenhoek
Which physician is first associated with vaccination?
a. Erlich
b. Jenner
c. Lister
d. Koch - answerb. Jenner
Common benefits of microorganisms include synthesis or production of...
a. antibiotic
b. hormones such as insulin
c. oxygen
d. alcohol
e. all of these - answere. all of these
Which of the following microbial groups is not considered "living"?
a. viruses only
b. bacteria only
c. protozoa only
d. fungi only
e. bacteria and fungi - answera. viruses only
You are performing a Gram stain on gram-negative bacteria and you stop after the
addition of the mordant. What is the appearance of the bacteria at this point?
a. purple
b. red
c. colorless
d. brown - answera. purple
What is the total magnification of a specimen viewed with a 10x ocular lens and a 45x
objective lens?
a. 4.5x
b. 10x
c. 45x
d. 100x
e. 450x - answere. 450x
In microscopy, the term resolution...
a. refers to the ability to distinguish fine structure and detail in a specimen.
b. is the same as the toal magnification of a specimen.
c. is improved when longer wavelengths of light are employed.
d. is only observed in stain specimens.
, e. refers to magnification when used the elctron microscope. - answera. refers to the
ability to distinguish fine structure and detail in a specimen
The negative stain, which gives a contrasting background, is used to...
a. visualize endospores
b. determine Gram reaction
c. determine flagella arrangment
d. visualize capsules
e. determine cell size - answerd. visualize capsules
Bacteria that are shaped like rigid helices are...
a. vibrios
b. spirilla
c. spirochetes
d. coccobacilli - answerc. spiralla
After the primary stain has been but before the decolorizer has been used, gram-
positive organisms are stained ________ and gram-negative prganisms are stained
_______.
a. blue; blue
b. blue; colorless
c. blue; pink
d. pink; pink - answerA. blue; blue
The lipopolysaccharide that is found in the outer membrane of gram-negative bacteria is
also known as...
a. exotoxin
b. teochioc acid
c. murien
d. endotoxin - answerd. endotoxin
Which of the following is useful in distinguishing between prokaryotic and eukaryotic
cells?
a. the use of DNA for the storage of genetic information
b. the presence of ribosomes for the synthesis of proteins
c. the presence of membrane-delimited organielles with the cytoplasm
d. all of these - answerc. the presence of membrane-delimited organielles with the
cytoplasm
Shrinkage of the plasma membrane away from the cell wall when the bacterium is
placed in a hypertonic enviroment is called...
a. osmolysis
b. plasmolysis
c. hydrolysis
d. hypertonolysis - answerb. plasmolysis
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