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38 Cards in this Set
- Front
- Back
The microbes commonly known as _____ are single celled eurkaryotes that are generally motile
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Protozoa
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Carl Woese proposed the concept of the domain based on differences in which of the following cellular molecules?
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Ribosomal RNA
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In microbiology, the term growth usually refers to an increase in
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The number of microbial cells
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Which of the following scientists provided evidence in favor of the concept of spontaneous generation
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Needham
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Which of the following is not a characteristic of viruses?
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They are visible with a light microscope.
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Which of the following is not a direct method for measuring the number of microbes in a sample?
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Turbidity
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Which of the following scientists was the first to develop a taxonomic system for classifying organisms?
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Carl Linneaus
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The study of the occurence, distribution, and spread of disease is known as.
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Epidemiology
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Which of the following bacterial cell structures plays an important role in the creation of biofilms?
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Fimbrae and glycocalyces
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The gram stain works because of the differences of _____ in bacteria.
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Cell walls
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Which of the following is not a component of bacterial cell walls?
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Tubulin
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Which of the following statements concerning Koch's postulates is false?
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A suspected pathogen must be found in the majority of individuals with the disease.
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Fermentation pathways provide a cell with alternative ways to regnerate NAD+ with glycolosis
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True
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Which of the following have external structures containing a periplasmic space?
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Gram-negative
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The ability of a lense to gather light.
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Numerical aperture
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Chemical reactions that can proceed toward anabolism or catabolism are called
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Amphibolic
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Nitrogen is a growth limiting nutrient for many organisms because
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Only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis.
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Which of the following is not a characteristic of a genus name?
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It is usually an adjective.
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Which of the following is not an observation Pasteur made concerning the fermentation of grape juice?
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Pasteurization kills yeast to prevent spoilage of grape juice.
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Which of the following is unique to Archae?
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Hami
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The term blank literally means ______ producing disease.
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Pathogen
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A colony forming unit is the number of cells
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That produces one colony.
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A student is looking at a bacterial specimen using the oil-immersion lens but has forgotten to put the immersion oil on the slide. The specimen will appear:
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Somewhat fuzzy and have poor resolution.
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Bacteria of the genus mycoplasm are distinguished from other bacterial cells by
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Absence of a cell wall
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In microscopy, the term resolution refers to
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The ability to distinguish, find structure in detail in a specimen.
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Anabolic reactions may be characterized as
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Breaking large molecules into smaller molecules.
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Which of the following individuals pioneered the use of chemicals to reduce the incidence of infections during surgery?
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Lister
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Which of the following can be the final electron receptor in anaerobic respiration in bacteria?
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Both nitrate and sulfate.
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NAD+ and NADP+ are important examples of both coenzymes and electron carriers.
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True
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Which organism is not correctly matched to it's energy source?
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Photoautotroph - CO2
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What is the fate of piruvic acid in an organism that uses aerobic respiration?
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Oxidized in the Kreb's Cycle
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If a microbiology lab technichian left the safranin out of a Gram-staining procedure, what would happen?
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Gram-positive would appear purple, gram-negative would be colorless.
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A bacterial cell moving toward light would be an example of
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Positive phototaxis
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Which of the following was not an aspect of Pasteur's experiment to disprove spontaneous generation?
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The flasks he used were sealed with corks.
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Bacterial cells are usually a few ____ in size.
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Micrometers
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MacConkey agar plates represent ______ medium.
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Differential and selective.
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Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeast are growing well on the multose medium but are not producing alcohol. What is the most likely explanation?
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Oxygen is in the medium.
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Which of the following is the best definition of fermentation?
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The partial oxidation of glucose with organic molecules serving as electron receptors.
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