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49 Cards in this Set
- Front
- Back
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Cells in cork were observed in 1665 under the magnifying glass of
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Hooke
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The microbiologist who first described magnified microbes as animalcules in 1676 was
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Van leeuwenhoek
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For which of the following is Pasteur Credited
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None of the abovee
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Jenner was the scientist who first
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immunized a person against smallpox
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The discovery of penicillin is
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all are correct
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The scientist who studied diseases such as anthrax and tuberculosis and then proposed the pstulates of infection was
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Koch
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Ivanowski is know for his work involving
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DNA structure
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The scientist who isolated and identified the human immuno deffecieny virus were
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Montagnier and Gallo
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Bacteria are generally measured in
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nanometers
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Bacteria of which genera are known to produce endospores
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Clostridium and bacillus
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of the following which are prokaryotes
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Bacteria
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Structures not found in prokaryotes include
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cell wall
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Which of the following is a eukaryote
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All are correct
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For which purposes are bacteria beneficial to humans
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All are correct
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A bacterium is described as bacillus. this means
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It is shaped like a rod
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A bacterial arrangement is described as staphylococcus. What this means is
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A cluster of berries
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Why is the innoculating loop flame sterilized before removal of innoculum
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to precent contamination of the stock culture
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Why is an acidic stain like (congo red) not taken up into the bacterial cell wall
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E and C correct
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the microscope has a lever for adjusting the image contrast. this device is called the
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Iris diaphragm
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A specimen is observed using the 100X objective lens. If the eyepieces magnify 10X, what is the toal magnification of the specimen
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1000X
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A bacterium is tested and found to be a gram negative diplococcus. What this means is
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only A is wrong
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A molecule is formed by electrons shared between two atoms. This type of bond ia
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B and D are correct
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An atom is said to have an atomic number of 17. what this means is
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it has 17 protons
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A molecule features a 1:2:1 ratio of carbon to hydrogen to oxygen. The molecule must be
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a fat
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the bonding together of amino acids to form proteins
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all are correct
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The 3 carbon molecule which is foundational to lipid synthesis is
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glycerol
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A lipid has a fatty acid with several carbons double bonded. This would make it
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unsaturated
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Peptidoglycan is found only in the cell walls of
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Bacteria
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The gram negative cell wall
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usually has an LPS outer membrane
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Under adverse conditions, which of the following bateria would produce an endospore?
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Clostridium Tetani
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Some bacteria have a non-nucleoid mass of DNA. This is know as
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the plasmid
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Which of the following structres constitues an endotoxin?
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the LPS outer membrane
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For what purpose might a microbe use a flagellum?
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motility
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Escherichia coli
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all are correct
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Strands of human DNA have been inserted into laboratory bacteria. One product of this procedure is
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the bacteria produce insulin
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Which of the following organisms possess a chloroplast?
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fungi
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Which microscope utilizes laser beams and forms three dimensionall images when interpreted by a computer
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confocal microscope
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Which microscope bounces electron beams off the surface of a specimen forming a three dimensional image of surface features?
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scanning electron microscope
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The ability of a microscoope to distinguish between two points on a specimen is its
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resolution
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Of the stains used in our laoratory, which are basic?
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Congo red
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Which is not part of the Gram stin procedure?
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forming the hanging drop
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The idea of spontaneous generation
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a and b are correct
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The mapping of an orgaism's DNA nucleotide sequence
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is called the geome
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Which of the following would be classified as an emergind disease>
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all of the above
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What is a viroid?
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A strand of RNA
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What properties make water a unique molecule?
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only d is wrong
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A molecule readily gives up a hydrogen ion when placed in solution. The molecule
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is an acid
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How many differnt amino acids are there?
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none of the above
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A bacterium has a generation time of one hour. If there are 200 of them to begin with, how many will be present after 6 hours?
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12,800
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