BIO 250 Microbiology Quiz Units 1-4 {2023} | BIO250 Microbiology Quiz Units 1-4 {A Grade}

BIO 250 Microbiology Quiz Units 1-4 {2023} Questions from Quiz Assignments 1-4 (3 of these sets are all quiz 1) Question 1 All of the following are reasons why some scientists believe that the term “prokaryote” is a somewhat artificial designation and should be discarded except Select one: a. Some bacteria have internal membranous structures. b. Some bacteria have their genetic material enclosed within a membrane. c. Some bacteria have 80S ribosomes. d. Many bacterial have cytoskeletal elements. Feedback The correct answer is: Some bacteria have 80S ribosomes. Question 2 Incorrect 0.00 points out of 4.50 Flag question Question text How do spheroplasts and protosplasts differ? Select one: a. Spheroplasts retain the peptidoglycan but protoplasts do not. b. Spheroplasts retain their outer membrane but protoplasts do not. c. There is no difference; these terms are synonyms. d. Spheroplasts form from cocci and protoplasts form from bacilli. Feedback The correct answer is: Spheroplasts retain their outer membrane but protoplasts do not. Question 3 Correct 4.50 points out of 4.50 Flag question Question text Which of the following is a characteristic of active transport? Select one: a. Saturable uptake rate b. Use of ATP or a proton gradient as a source of metabolic energy c. Can move materials against a concentration gradient d. All of the choices are correct. Feedback The correct answer is: All of the choices are correct. Question 4 Correct 4.50 points out of 4.50 Flag question Question text You have been studying the effect of a concentration gradient on the rate of transport of a nutrient into a bacterial cell. If a carrier protein is involved in the transport of this nutrient, which curve would you expect to see? Select one: a. A b. B c. C Feedback The correct answer is: A Question 5 Correct 4.50 points out of 4.50 Flag question Question text Which statement correctly describes archaeal cell walls? Select one: a. Some have an outer layer of complex polysaccharide. b. Some have an outer layer of protein. c. Many have peptidoglycan. d. Some have an outer layer of complex polysaccharide and some have an outer layer of protein. Feedback The correct answer is: Some have an outer layer of complex polysaccharide and some have an outer layer of protein. Question 6 Correct 4.50 points out of 4.50 Flag question Question text The food vacuoles and phagocytic vacuoles are most similar to Select one: a. mitochondria. b. chloroplasts. c. lysosomes. d. Golgi apparatus. Feedback The correct answer is: lysosomes. Question 7 Correct 4.50 points out of 4.50 Flag question Question text A newly discovered unicellular microbe has a nucleus containing linear chromosomes and surrounded by a membrane. It has mitochondria, 80s ribosomes, and is covered by cilia. There is no cell wall external to the plasma membrane. This organism most likely would be a/an Select one: a. bacterium. b. archaeon. c. protozoan. d. fungus. e. algae. Feedback The correct answer is: protozoan. Question 8 Correct 4.50 points out of 4.50 Flag question Question text Which of the following is a function of the mitochondrion? Select one: a. Tricarboxylic acid cycle enzyme reactions b. Electron transport c. ATP synthesis d. All of the choices are correct. Feedback The correct answer is: All of the choices are correct. Question 9 Correct 4.50 points out of 4.50 Flag question Question text Virion size ranges from Select one: a. 1–40 nm. b. 10–400 nm. c. 600–1,000 nm. d. 1,000–10,000 nm. Feedback The correct answer is: 10–400 nm. Question 10 Correct 4.50 points out of 4.50 Flag question Question text Which virion release process is most often used by enveloped viruses? Select one: a. Lysis b. Facilitated diffusion c. Budding d. Diffusion through channel protein Feedback The correct answer is: Budding Question 11 Correct 4.50 points out of 4.50 Flag question Question text Which of the following diseases is (are) caused by prions? Select one: a. Scrapie b. Mad cow disease c. Kuru and Creutzfeldt-Jakob Disease d. All of the choices are correct. Feedback The correct answer is: All of the choices are correct. Question 12 Correct 4.50 points out of 4.50 Flag question Question text Which of the following apicomplexan genera cause coccidiosis in chickens? Select one: a. Pneumocystis b. Eimeria c. Plasmodium d. Toxoplasma Feedback The correct answer is: Eimeria Question 13 Correct 4.50 points out of 4.50 Flag question Question text Which of the following is found in the intestine of termites and produces enzymes needed to digest wood particles? Select one: a. Giardia b. Trichomonas c. Trichonymphida d. Nyctotherus Feedback The correct answer is: Trichonymphida Question 14 Correct 4.50 points out of 4.50 Flag question Question text Some ciliophora can discharge toxic threadlike darts called ___________, which are used in capturing prey. Select one: a. spikes b. spicules c. toxicysts d. toxipodia Feedback The correct answer is: toxicysts - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - Question 7 Correct 4.50 points out of 4.50 Flag question Question text In lichens, the fungi send projections of their hyphae across the algal cell wall in order to obtain nutrients from the photosynthetic partner. These projections are called Select one: a. mycelia. b. hyphal extensions. c. haustoria. d. lichenthropes. Feedback The correct answer is: haustoria. Question 8 Correct 4.50 points out of 4.50 Flag question Question text When members of the normal microbiota of the human body become pathogenic and produce disease under certain circumstances, they are referred to as ______________ pathogens. Select one: a. partial b. conditional c. occasional d. opportunistic Feedback The correct answer is: opportunistic Question 9 Correct 4.50 points out of 4.50 Flag question Question text Complement Select one: a. augments opsonization of bacteria by antibodies. b. results in lysis of Gram-negative bacteria. c. results in lysis of Gram-positive bacteria. d. both augments opsonization of bacteria by antibodies and results in lysis of Gram-negative bacteria. e. All of the choices are correct. Feedback The correct answer is: both augments opsonization of bacteria by antibodies and results in lysis of Gram-negative bacteria. Question 10 Correct 4.50 points out of 4.50 Flag question Question text Which is a primary reason that females are at greater risk of a urinary tract infection than are males? Select one: a. The urethra is shorter in women, therefore bacteria are closer in proximity to the bladder. b. The urethra is longer in women, therefore more bacteria can colonize the pathway to the bladder. c. The pH of women is lower due to a greater abundance of lactobacilli which can overcolonize the urethra and migrate to the bladder. d. Hormonal shifts in women can lead to overgrowth of genitourinary bacteria that eventually colonize the bladder. Feedback The correct answer is: The urethra is shorter in women, therefore bacteria are closer in proximity to the bladder. Question 11 Correct 4.50 points out of 4.50 Flag question Question text A mast cell is similar to a basophil in that both Select one: a. are types of white blood cells. b. are agranulocytic. c. are vasoactive mediators. d. act as primary phagocytes. e. None of the choices are correct. Feedback The correct answer is: are vasoactive mediators. Question 12 Correct 4.50 points out of 4.50 Flag question Question text The secondary immune response is typically stronger than the primary response because __________ during the secondary response. Select one: a. all classes of immunoglobulins are active b. both B and T cells are activated c. the antigen is weakened by the primary response d. a larger population of lymphocytes reactive to antigen has developed Feedback The correct answer is: a larger population of lymphocytes reactive to antigen has developed Question 13 Correct 4.50 points out of 4.50 Flag question Question text T cells produce and secrete factors that do not directly interact with invading microorganisms but that augment the body's defense mechanisms. These molecules are called _________. Select one: a. antibodies b. cytokines c. immunogens d. augmetins Feedback The correct answer is: cytokines Question 14 Correct 4.50 points out of 4.50 Flag question Question text Which of the following is a facultative, rather than obligate, intracellular pathogen? Select one: a. Chlamydia b. Brucella c. Rickettsia d. All of the choices are correct. Feedback The correct answer is: Brucella Question 15 Correct 4.50 points out of 4.50 Flag question Question text Vector-borne transmission can be either external or internal. In external (mechanical) transmission, the pathogen is carried Select one: a. on a fomite. b. on the body surface of a vector. c. within the vector. d. All of the choices are correct. Feedback The correct answer is: on the body surface of a vector. Question 16 Correct 4.50 points out of 4.50 Flag question Question text The condition in the host that results from pathogenic parasitic organism growing and multiplying within or on the host is called Select one: a. an infection. b. an infectious disease. c. pathogenesis. d. All of the choices are correct. Feedback The correct answer is: an infection. Question 17 Correct 4.50 points out of 4.50 Flag question Question text Standard microbiological practices include all of the following EXCEPT Select one: a. work space should be disinfected only when contaminating spills occur. b. eating, drinking, manipulation of contact lenses, and the use of cosmetics, gum, and tobacco products are strictly prohibited in the lab. c. lab personnel should know how to use the emergency eyewash and shower stations. d. hair longer than shoulder length should be tied back. Feedback The correct answer is: work space should be disinfected only when contaminating spills occur. Question 18 Correct 4.50 points out of 4.50 Flag question Question text The immunological reaction that occurs when there is an optimal ratio of antigen and antibody, producing a lattice at the zone of equivalence is known _________. Select one: a. immunoblotting b. immunoelectrophoresis c. immunodiffusion d. immunoprecipitation Feedback The correct answer is: immunoprecipitation Question 19 Incorrect 0.00 points out of 4.50 Flag question Question text Which of the following is an example of a noncommunicable infectious disease? Select one: a. Influenza b. Diabetes mellitus c. Urinary bladder infection d. Strep throat Feedback The correct answer is: Urinary bladder infection Question 20 Correct 4.50 points out of 4.50 Flag question Question text Public health surveillance is the proactive evaluation of Select one: a. genetic background. b. environmental conditions. c. human behaviors and lifestyle choices. d. emerging infectious agents. e. All of the choices are correct.