UNE Microbiology Final Exam All Possible Questions and Answers with complete solution

Nitrogen is a growth Limiting nutrient for many organisms because -only a few microbes can extract it from the atmosphere, but all organisms require if for amino acid and nucleotide synthesis An organism that tolerates high _ is called a halophile - Salt concentrations What tests are used to help identify bacteria today? - All of the above all of the following are used to protect organisms from the toxic by products of oxygen EXCEPT - protease A metabolic pathway - All the above are true which of the following molecules would be expected to cross the cytoplasmic membrane rapidly and without the use of transport proteins? - Small hydrophobic Molecules The molecule that an enzyme acts upon is know as its - substrate any process hat releases energy is referred to as _ process - exergonic __ are complex communities of various types of microbes that adhere to surfaces - biofilm In 854, John Snow determined that contaminated water transmits - Cholera Koch's postulates provided guidelines for -relating certain microorganisms with certain diseases The place on the enzyme where the enzyme interacts with the substrate is called the -active site Lipid A is also known as - endotoxinAt temperatures higher than the maximum growth temperature for an organism - hydrogen bonds are broken, proteins are denatured, and membranes become too fluid Microbes that can live in the presence or absence of oxygen are called -facultative anerobe During which growth phase are bacteria more susceptible to antimicrobial drugs - Log phase Anabolic reactions may be characterized as -forming large molecules from smaller molecules heat is used in the destruction of bacteria because heat - denatures enzymes by altering their tertiary structure which of the following prokaryotic cells contain an outer membrane -gram-negative bacteria The study of the occurrence, distribution, and spread of disease is known as - epidemiology which of the following was NOT an aspect of Pasteur's experiments to disprove spontaneous generation -The flasks he used were sealed with corks Leeuwenhoek made lenses that allowed him to magnify objects more than 200x. however, he failed to promote scientific inquiry because - He didnt reveal how to grind the lenses and no one else was doing it that well An __ organism is one that requires oxygen for growth - Obligate aerobic which of the following statements concerning the characteristics of life is FALSE - Reproduction is defined as an increase in the size of an organism __ involves the ability of bacterial cells to sense their numbers by producing and responding to extracellular chemicals - Quorum Sensing The study of the body's defenses against pathogens is called - ImmunologyWhich of the following measurement techniques would be useful to quantify a species of bacteria that is difficult to culture? -Microscope counts