BIOS 242 Quiz 2 Microbiology practice exam questions and answers solution

BIOS 242 Quiz 2 Microbiology practice exam questions and answers solution (TCO 3) Cellular organelles and viruses are generally measured in . nanometers millimeters micrometers centimeters decimeters Chapter 4: Microscopy, Staining, and Classification (TCO 3) Why does immersion oil improve resolution? It allows light to travel at a uniform speed on its way to the lens. It decreases the working distance. It increases the numerical aperture. It increases numerical aperture and maintains a uniform light speed. It increases the angle of refraction of the light. Chapter 4: Microscopy, Staining, and Classification (TCO 3) A patient with tuberculosis could be diagnosed by use of the stain. Gram endospore acid-fast flagellar capsule Chapter 4: Microscopy, Staining, and Classification (TCO 3) The rules of naming organisms are called . taxonomy nomenclature classification binomials identification (TCO 3) Which of the following statements about transmission electron microscopy is false? Thin segments must be used. Electrons are the source of illumination. Glass lenses are used. The sample is placed in a vacuum. Stains can be applied to improve contrast. (TCO 4) A cell that uses an organic carbon source and obtains energy from light would be called a . photoheterotroph lithoautotroph photoautotroph chemoheterotroph chemoautotroph (TCO 4) Human pathogens are classified as . thermoduric thermophiles mesophiles hyperthermophiles psychrophiles (TCO 4) Organisms that can grow with or without oxygen present are . obligate aerobes facultative anaerobes aerotolerant anaerobes obligate anaerobes either facultative anaerobes or aerotolerant anaerobes (TCO 4) The use of salt and sugar in preserving various types of foods is an application of which of the following concepts? Nitrogen fixation Osmotic pressure pH Hydrostatic pressure Quorum sensing (TCO 4) During the of growth, new cells are being produced at the same rate as other cells are dying. lag phase log phase death phase stationary phase intermediate phase (TCO 4) Compare and contrast the streak-plate method of isolation with the pour-plate method of isolation.