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43 Cards in this Set
- Front
- Back
The first documented description of a microorganism was of a __________ by ____________ __________________. |
Mold Robert Hooke |
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__________ produced by microbial fermentation of glucose from cellulose or cornstarch is becoming a more important component of bio fuels in the United States and specialized _____________ are needed to make this commercially available product. |
Ethanol Industrial microbiologists |
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Microbial sterilization is used to... |
Kill all microbes in or on an object |
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Microbes playing a role in nitrogen fixation in plants live in ____________, while those playing a role in the digestive tract of certain herbivores live in _______________. |
Nodules Rumens |
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The disease anthrax is caused by a pathogenic bacterium ______________, which produces heat-resistant structures known as ________________. |
Bacillus anthracis Endospores |
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You discovered a new coccoid shaped microorganism with no nucleus, a rigid cell wall and a diameter of 2um. Chemical tests reveal that it's cell wall does NOT contain peptidoglycan. The new microorganism is: |
Most likely an Archaeon |
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Determine which outcome is LEAST likely for a microorganism being motile. |
Transfer of plasmids to progeny |
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Some of the intestinal symptoms elicited by a pathogen such as Escherichia Coli (gram -) are due to the presence of |
Lipopolysaccharides |
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A pure culture is |
A population of identical cells |
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The science of grouping and classifying microorganisms is known as: |
Microbial systematics |
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An organism of the genus Staphylococcus is ____________, while an organism of the genus Spirocheata is _____________.
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Spherical Coiled |
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A pasture flask has a(n) |
Swan neck to prevent particular matter from getting into the main body of the flask |
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Most prokaryotic cells reside |
In the oceanic and terrestrial subsurfaces |
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Mycobacterium tuberculosis is very difficult to stain because of the |
Large amounts of a waxy lipid present in its cell wall |
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The process where by microorganisms are used to help clean up pollution created by human activities is known as |
Bioremediation |
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A microbial cells membrane is considered ______________, because its internal constituents are maintained within the cell. However, it also imports and exports other molecules in response to its environment |
Semipermeable |
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Bacteria stain as gram positive or gram negative because of the difference in their |
Cell wall |
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The lipids in the cytoplasmic membrane of bacteria and ___________ contained yet linkages, while the cytoplasm membrane of _____________ contain ether linkages. |
Eukarya Archaea |
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The person who described the "wee animalcules" was |
Antoni Van Leeuwenhoek |
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Which of the following statements is true? |
Fibrial are usually shorter than flagella and enable cells to adhere to surfaces, whereas pilli are involved in genetic exchange |
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_____________ are chemical molecules that are partially responsible for the ____________ charge of gram-positive bacterial cell surface. |
Teichoic acids Negative |
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Which of the following types of microscopy could be used to visualize the layers of the cell membrane and the cell wall? |
Transmission electron microscopy |
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Microbial ecology is the study of |
Microorganisms in their natural environments |
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Which scientific objective is LEAST related to microbial genetics? |
Identifying quorum sensing interactions among bacteria |
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Which of the following types of microscopy can be used with live cells? |
Phase contrast microscopy |
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Microbial control in waste waters would most logically be a part of |
Aquatic microbiology |
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The use of gram stain in microbiology is important because it differentiates |
Bacterial cells with different types of cell walls |
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Aseptic technique refers to |
A series of practices to avoid containment |
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The term run and tumble are generally associated with |
Chemotaxis |
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Transparent double sided dishes that are used for growing microbes are most commonly called |
Petri dishes |
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Developments in the field of immunology and medical microbiology were practical extensions of the work of... |
Robert Koch |
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When does endospore formation commence? |
When bacterial growth ceases due to limitation of an essential nutrient |
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___________ was the first to describe microorganisms, while __________ was the first person to see bacteria. |
Robert Hooke Antoni Va Leeuwenhoek |
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The production of human hormones (eg. Insulin) by genetically engineered microorganisms is an example of ______________, a sub discipline of microbiology. |
Biotechnology |
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Which of these genera are responsible for producing spores? |
Clostridium |
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In Gram positive bacteria, the cell walls are composed mainly of thick _____________ layers. |
Peptidoglycan |
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All eukaryotes contain |
A membrane enclosed nucleus |
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Electron microscopy has greater ________________ then light microscopy because the wavelength of visible light is much longer than then the wave length of electrons. |
Resolution |
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The theory of spontaneous generation was refuted by the work of |
Louis Pasture |
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The structure that confers structural strength on cell is known as the |
Cell wall |
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Uni Porters |
Transfers one molecule in one direction,usually with the concentration gradient |
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Symporters |
Transfers two different now molecules in the same direction at the same time |
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Antiporter |
Transfers two different molecules in opposite directions at the same time |