Studies by Emil von Behring and Shibasaburo Kitasato demonstrated that inactivated toxins can induce the synthesis of antitoxins in the blood of rabbits. These antitoxins (antibodies) are the basis of...
a. humoral immunity
b. cell-mediated immunity
c. antibiotic immunity
d. phagocyte-mediat...
Studies by Emil von Behring and Shibasaburo Kitasato demonstrated that inactivated toxins can induce
the synthesis of antitoxins in the blood of rabbits. These antitoxins (antibodies) are the basis of...
a. humoral immunity
b. cell-mediated immunity
c. antibiotic immunity
d. phagocyte-mediated immunity - correct answer a. humoral immunity
Who of the following first discovered that some blood leukocytes could engulf disease-causing bacteria?
a. von Behring
b. Meister
c. Metchnikoff
d. Ivanowski - correct answer c. Metchnikoff
Who is credited with developing a vaccine against chicken cholera?
a. Koch
b. Pasteur
c. Jenner
d. Lister - correct answer b. Pasteur
The concept that living organisms arise from nonliving material is called...
a. biogenesis
b. cell theory
c. spontaneous generation
,Microbiology Straighterline (Quizzes)
d. germ theory - correct answer c. spontaneous generation
Protists contain all of the following forms of life EXCEPT...
a. protozoa
b. fungi
c. slime molds
d. algae - correct answer b. fungi
Cells with a relatively simple cell morphology that do not have a true membrane-delimited nucleus are
called...
a. prokaryotes
b. eukaryotes
c. urkaryotes
d. nokaryotes - correct answer a. prokaryotes
The ribosomal RNA studies that led to the division of prokaryotic organisms into the Bacteria and the
Archaea were begun by...
a. Pasteur
b. Woese
c. Needham
d. Watson - correct answer b. Woese
In a search for new antibiotics, a previously unknown organism has been recovered from the soil. It is
nonmotile and is composed of long threadlike structures formed from nucleated cells. It is not-
photosynthetic and absorbs its nutrients. This organism will most likely be classified among the...
a. bacteria
,Microbiology Straighterline (Quizzes)
b. archaea
c. eukaryotes (fungi)
d. eukaryotes (protozoa)
e. eukaryotes (algae) - correct answer c. eukaryotes (fungi)
If immersion oil was replaced with water, what would happen?
a. The refractive index would increase, improving resolution
b. The refractive index of water would be greater than air but less than oil, improving resolution less
than oil.
c. The refractive index of water would be less than that of air, decreasing resolution.
d. There would be no difference. - correct answer b. The refractive index of water would be greater than
air but less than oil, improving resolution less than oil.
Prior to staining, smears of microorganisms are heat-fixed in order to...
a. allow eventual visualization of internal structures.
b. ensure removal of dust particles from the slide surface.
c. attach it firmly to the slide.
d. create small pores in cells that facilitates binding of stain to cell structures. - correct answer c. attach it
firmly to the slide.
If the decolorizer is left on too long in the Gram-staining procedure, gram-positive organisms will be
stained __________ and gram-negative organisms will be stained __________.
a. purple; blue
b. purple; colorless
c. purple; pink
d. pink; pink - correct answer d. pink; pink
, Microbiology Straighterline (Quizzes)
Regions of a specimen with higher electron density scatter ___________ electrons and, therefore,
appear __________ in the image projected onto the screen of a transmission electron microscope.
a. more; lighter
b. more; darker
c. fewer; darker
d. fewer; lighter - correct answer b. more; darker
In the Gram-staining procedure, the mordant is...
a. iodine.
b. safranin.
c. crystal violet.
d. alcohol. - correct answer a. iodine.
Acid-fast organisms such as Mycobacterium tuberculosis contain lipids constructed from
________________in their cell walls.
a. proteins
b. carbohydrates
c. mycolic acids
d. peptidoglycan - correct answer c. mycolic acids
Fatty acid methyl ester (FAME) analysis is particularly important in public health because in this
application, microbiologists seek to identify specific microbial pathogens in ______.
a. food and water
b. patient samples
c. genomic analysis
d. genetic diseases - correct answer a. food and water
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller arriane. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
