Microbes and Society Final Exam 2024 Questions and Answers

Microbes and Society Final Exam 2024 Questions and Answers Spontaneous generation is the belief that -Answer-living things arise from nonliving matter A solution of pH 7 compared to a solution of pH 9 -Answer-has more H+ ions The alpha helix and beta pleated sheet are examples of -Answer-secondary structure A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution. If chemical analysis was performed to identify the contents of each beaker, which of the following would be found in the beaker of DNA but not in the beaker with glucose? -Answer-nitrogen and phosphorous atoms What part of a phospholipid forms hydrophobic tails? -Answer-fatty acids All of the following are diameters of cells that would be resolved in a microscope with a limit of resolution 0.2 um -Answer-0.1 um The type of microscope in which you would see brightly illuminated specimens against a black background is -Answer-dark-field The building blocks of an enzyme are -Answer-amino acids All of the following are lipids except -Answer-starch Cations are -Answer-capable of forming ionic bonds and anions This microscope is the most widely used and shows cells against a bright background - Answer-bright-field If a microbiologist is studying a specimen at a total magnification of 950x, what is the magnifying power of the objective lens if the ocular lens is 10x? -Answer-95x The type of chemical bond linking amino acids together is a -Answer-peptide bond All of the following are correct about prokaryotes except -Answer-they have organelles T/F: A covalent bond is formed between an anion and a cation. -Answer-False The primary purpose of staining cells on a microscope slide is to -Answer-add contrast in order to see them better The Dutch merchant who made and used quality magnifying lenses to see and record microorganisms was -Answer-Antonie van Leeuwenhoek How many times more acidic is a solution with a pH of 3 than a solution with a pH of 6? -Answer-1000 All of the following are monosaccharides except -Answer-starch All of the following are processes that define life except -Answer-ability to invade host cells T/F: Once a true organism is assigned to a particular taxonomic hierarchy, it is permanent and cannot be revised -Answer-False Water molecules are nonpolar molecules -Answer-False Why is oil of immersion often used when viewing specimens under the microscope? - Answer-to increase the resolution Which of the following is a taxon that contains all the other taxa? -Answer-kingdom T/F: Members of the same species share many more characteristics compared to those shared by members of the same kingdom. -Answer-True T/F: Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization. -Answer-False T/F: Only charged atoms can form ionic bonds -Answer-True The Gram stain, acid-fast stain, and endospore stain have the following in common: - Answer-are differential stains T/F: All proteins are enzymes -Answer-False Which amino acid contains sulfur atoms that form cova