front 1 What is the function of the cellular structure indicated by "c" in Figure 3.2? | back 1 provide shape attach to surfaces and protect from dehydration |
front 2 Which of the following have a periplasmic space? | back 2 Gram negative bacteria only |
front 3 Which of the following prokaryotic cells contain an outer membrane? | back 3 Gram negative bacteria only |
front 4 What is the function of the cellular structure indicated by "p" in figure 3-3? | back 4 ATP synthesis |
front 5 Viruses are generally measured in ? | back 5 Nanometers |
front 6 Which of the following is an INCORRECT pairing? | back 6 numerical aperture; curved glass |
front 7 The ability of a lens to gather light is referred to as its | back 7 numerical apertue |
front 8 Which of the following are magnifying lenses? | back 8 both objective and the ocular |
front 9 If you were trying to visualize flagella without staining, which microscope would you use? | back 9 Phase Contrast |
front 10 Why does immersion oil improve resolution? | back 10 It increases numerical aperture and maintains a uniform light speed |
front 11 You are shown a micrograph from a light microscope in which the specimens appear bright compared to the background. The micrograph is probably from an ______ microscope. | back 11 Dark field |
front 12 The microscope preferred for viewing living specimens is the _____ microscope. | back 12 phase-contrast |
front 13 Which of the following is NOT associated with an electron microscope? | back 13 a prism |
front 14 All of the following are types of light microscopes EXCEPT | back 14 scanning tunneling |
front 15 Which of the following microscopes produces the highest resolution images? | back 15 atomic force |
front 16 If a microbiology lab student left the safranin out of the Gram stain procedure, what would be the result? | back 16 Gram positive cells would be purple and Gram negative cells would be colorless |
front 17 All of the following are common to both the Gram stain and the acid-fast stain EXCEPT | back 17 a chemical mordant |
front 18 Safrainin dye is used as the counterstain in ______ stains. | back 18 Both gram stain and endospore |
front 19 Heat is used to drive the stain into cells in the ____ staining procedures. | back 19 both acid-fast and endospore stains |
front 20 Carbolfuchsin is the ____ in the acid fast stain. | back 20 primary stain |
front 21 A sample is prepared using osminum tetroxide as a stain. This sample has been prepared for an _____ microscope. | back 21 electron |
front 22 The kingdoms included in the Linnaeus system of classification are | back 22 Animalia and Plantae |
front 23 The rules of naming organisms are called | back 23 nomencalture |
front 24 Species and strains of microbes can be distinguished from one another phenotypically using | back 24 serological tests |
front 25 Which of the following is NOT a characteristic of a genus name? | back 25 It is usually an adjective |
front 26 Carl Woese proposed the concept of the domain based on differences of which of the following cellular molecules? | back 26 ribosomal RNA |
front 27 Which of the following classification methods relies on the morphology of organisms? | back 27 physical (phenotypic) characteristics |
front 28 A cell's G + C ratio is associated with which of the following classification methods? | back 28 analysis of nucleic acids |
front 29 Viruses are not included in the taxonomic scheme proposed by Carl Woese because they lack? | back 29 Ribosomal RNA |
front 30 Why have some microbiologist proposed using ribosomal RNA as the basis for defining bacterial species? | back 30 Bacteria are not interbreeding populations, and ribosomal RNAs are highly conserved genes present in all prokaryotes |
front 31 Which of the following phenomena produces magnification? | back 31 the refraction of radiation as it passes through a lens |
front 32 A virologist wants to observe the surface features of virus particles she is studying. Which of the following microscopes would NOT be useful for her observation? | back 32 differential interference contrast |
front 33 A structure that appears in a transmission electron micrograph but is NOT actually present in the specimen is known as a ____ | back 33 artifact |
front 34 Which of the following statements about transmission electron microscopy is FALSE? | back 34 Glass lenses are used |
front 35 Acidic Dyes ___ | back 35 are negatively charged and work best at low pH |
front 36 A thin film of microbes on a slide is a ____ | back 36 smear |
front 37 The Gram stain works because of differences in the _____ of bacteria. | back 37 Cell walls |
front 38 the primary goal of modern taxonomists is to | back 38 understand the phylogenetic relationships between organisms |
front 39 Why are modern light microscopes better than the ones Leeuwenhoek used? | back 39 modern microscopes have a fivefold better resolution |
front 40 In the Gram stain procedure, iodine serves as a | back 40 mordant |
front 41 What role does safranin play in the Gram stain procedure? | back 41 counterstain |
front 42 In Gram staining ethanol-acetone is used as a | back 42 decolorizing agent |
front 43 A sample from a patient is prepared using the Gomori methenamine silver stain. What type of microbe is suspected of being present? | back 43 Fungus |
front 44 Tungsten is a reagent used in the | back 44 electron microscopy stain |
front 45 The ____ stain is one in which eosin is used | back 45 negative |
front 46 Tannic acid is a mordant (chemical fictive) used in the ____ stain. | back 46 flagellar |
front 47 Methylene blue can be used to stain DNA because it | back 47 forms ionic bonds with DNA |
front 48 The _____ stain makes use of malachite green. | back 48 endospore |
front 49 The most appropriate unit of measurement for intact archaea is the | back 49 micrometer |
front 50 The limits of resolution of atomic force microscopes are in the range of | back 50 nanometers |
front 51 the size of a port tapeworm is generally described in terms of | back 51 meters(m) |
front 52 A measurement of a mcirobe is reported as 1 x 10 -6m, also known as | back 52 micrometers (um) |
front 53 One-thousandths of a meter is a | back 53 millimeter (mm) |
front 54 Bacteria and many other microbes do not ______ and therefore do not fit Linneaus' definition species | back 54 reproduce sexually |