Mic 102 Quizzes Questions with Correct Answers

Mic 102 Quizzes Questions with Correct Answers What is a function of a prokaryotic cell membrane? a. Lipid synthesis b. Protein secretion c. Respiratory electron transport d. Osmotic barrier e. All of these are true - Answer-E. All of these are true Which of the following cell components would not be found on a gram-positive, circularshaped bacterium? a. Outer membrane b. Teichoic acids c. S layer d. Flagellum e. Murein - Answer-A. Outer membrane Which structure can give more rigidity to the cell wall? a. Pili b. S layer c. Murein d. Teichoic acids e. Lipopolysaccharide - Answer-D. Teichoic acids What part of the flagellum can bind ATP to fuel movement? a. filament b. hook c. basal body d. fimbriae e. pilus - Answer-C. basal body Choose the true statement. Bacterial genomes: a. are organized into a nucleus b. are simple and relatively even in size c. share all of the same genes d. are compacted using supercoiling and other factors - Answer-d. are compacted using supercoiling and other factors Which is not a specialized structure bacteria may have? a. vacuole b. flagella c. gas vesicle d. storage granule e. thylakoid - Answer-a. vacuole What is true about magnetosomes? a. They are long, thin membrane vesicles b. They are protein-encased granules used for buoyancy c. They organize proteins for photosynthesis d. They store harmful minerals in a granule - Answer-a. They are long, thin membrane vesicles A specialized (type 1A) topoisomerase found in thermophiles called reverse gyrase can: a. function only with ATP hydrolysis b. induce (create) positive supercoils c. induce (create) negative supercoils d. progressively unwind DNA for replication e. store energy in RNAs by supercoiling - Answer-b. induce (create) positive supercoils To measure the number of viable cells in a culture, the best method to use is: a. optical density b. colony counting c. flow cytometry d. hemacytometer count e. none of these - Answer-b. colony counting In which phase of growth have cells exceeded the maximal growth rate? (If which phase of growth have cells proceeded beyond the maximal growth rate?) a. germination phase b. exponential phase c. stationary phase d. sporulation e. lag phase - Answer-c. stationary phase What kind of bacteria can live comfortably as a symbiont with the ghostfish of the Mariana Trench, 5 miles below sea level? a. psychrophile b. thermophile c. halophile d. mesophile e. piezophile - Answer-e. piezophile MinE promotes even bacterial cell division by: a. localizing to the septum b. forming a ring at the midline c. blocking MinD and MinC polymerization at the cell poles d. blocking MinD and MinC polymerization in the cell middle region e. promoting FtsZ polymerization at the cell poles - Answer-d. blocking MinD and MinC polymerization in the cell middle region A prokaryote that can utilize light as an energy source but cannot use inorganic carbon sources like CO2 as a sole carbon source is a: a. photoheterotroph b. chemoheterotroph c. photoautotroph d. chemoautotroph - Answer-a. photoheterotroph What class of macromolecule consumes the most energy for biosynthesis? a. RNA b. DNA c. Protein d. Phospholipid e. Peptidoglycan - Answer-c. protein Precursor metabolites a. result from fueling reactions (catabolism) b. are necessary for biosynthesis (anabolism) c. comprise small ionic species such as Mg 2+ and Cld. (a) AND (b) e. (a) AND (c) - Answer-d. a and b