MIC 205 Final Test Questions with Correct Answers

MIC 205 Final Test Questions with Correct Answers A culture medium on which only gram-positive organisms grow and yellow halo surrounds Staphylococcus aureus colonies is called a(n) A) selective medium. B) differential medium. C) enrichment culture. D) selective and differential medium. E) differential and enrichment culture. - Answer-d) selective and differential medium. Which of the following statements regarding the glycolysis pathway is FALSE? A) Four ATP molecules are generated via substrate-level phosphorylation. B) One molecule of ATP is expended. C) Two pyruvate molecules are generated. D) Two NADH molecules are generated. E) Two molecules of water are generated. - Answer-BOTH: B) One molecule of ATP is expended. AND E) two molecules of water are generated. Which of the following organelles most closely resembles a prokaryotic cell? A) Golgi complex B) nucleus C) vacuole D) mitochondrion E) cell wall - Answer-D) mitochondrion In which of the following situations would Koch's postulates be utilized? A) formulation of a vaccine against a new pathogen in a genetic engineering lab B) determination of the cause of cancer in a patient C) development of a new antibiotic in a pharmaceutical lab D) determination of the cause of a patient's illness in a hospital microbiology lab E) whenever the scientific method is used to investigate a microbiological problem - Answer-D) determination of the cause of a patient's in a hospital microbiology lab. What is the fate of pyruvic acid in an organism that uses aerobic respiration? A) It is converted into acetyl CoA. B) It is reduced to lactic acid. C) It is catabolized in glycolysis. D) It reacts with oxaloacetate to form citrate. E) It is oxidized in the electron transport chain. - Answer-A) It is converted to acetyl CoA. 8) Archaea differ from bacteria in that archaea A) reproduce by binary fission. B) are prokaryotic. C) have no peptidoglycan in their cell walls. D) lack nuclei. E) use organic compounds for food. - Answer-C) have no peptidoglycan in their cell walls. 9) Which of the following pairs is mismatched? A) scanning tunneling microscope —allows visualization of atoms B) fluorescence microscope —uses a fluorescent light C) confocal microscope —produces a three-dimensional image D) scanning electron microscope —produces a three-dimensional image E) darkfield microscope —uses visible light - Answer-B) fluorescence microscope- uses a fluorescent light Which of the following is the best definition of fermentation? A) the partial oxidation of glucose with organic molecules serving as electron acceptors B) the production of energy by both substrate and oxidative phosphorylation C) the complete catabolism of glucose to CO2 and H2O D) the production of energy by oxidative-level phosphorylation E) the partial reduction of glucose to pyruvic acid - Answer-A) a partial oxidation of glucose with organic molecules serving as electron acceptors. ___________ can be broken down via hydrolysis. A) Amino acid B) Disaccharides C) Monosaccharide D) Only b and a E) Only b and c - Answer-D) only b and a In green and purple bacteria, electrons to reduce CO2 can come from A) H2O. B) CO2. C) H2S. D) C6H12O6. E) chlorophyll. - Answer-C) H2S The resolution of a microscope can be improved by changing the A) condenser. B) coarse adjustment. C) wavelength of light. D) fine adjustment. E) diaphragm. - Answer-C) wavelength of light Which of the following is correctly matched? A) Used cowpox to vaccinate against smallpox — Robert Koch B) Was a pioneer of aseptic surgeries — Edward Jenner C) Was known for a series of postulates that relate a microbe to a disease — Louis Pasteur D) Discovered use of penicillin as an antibiotic — Alexander Fleming E) Disproved the theory of spontaneous generation — Joseph Lister - Answer-D) discovered use of penicillin as an antibiotic-- Alexander Fleming Which organism is NOT correctly matched to its energy source? A) chemoheterotroph - glucose B) chemoautotroph-NH3 C) photoheterotroph - light D) chemoautotroph - Fe2+ E) photoautotroph - CO2 - Answer-E) photoautotroph - CO2 Identify the following reaction: Glucose + Fructose → Sucrose + Water A) dehydration synthesis reaction B) reversible reaction C) ionic reaction D) hydrolysis reaction E) exchange reaction - Answer-A) dehydration synthesis reaction