Microbiology Exam 3 PDF

1) Activities of a chemotherapeutic agent that damage the host : a) plasmids b) broad spectrum c) side effects d) antimetabolites 2) An example of an antifungal agent: a) griseofulvin b) ampicilline) tetracycline d) interferon e) Keflex 3) Which organism would not produce catalase? a) Staphylococc...

1) Activities of a chemotherapeutic agent that damage the host : a) plasmids b) broad spectrum c) side effects d) antimetabolites 2) An example of an antifungal agent: a) griseofulvin b) ampicilline) tetracycline d) interferon e) Keflex 3) Which organism would not produce catalase? a) Staphylococcus aureus b) Pseudomonas aeruginosa c) Bacillus subtilis d Bacteriodes amylophilus 4) Name an organism that can convert H2SO4 to HeS: a) Bacillus subtills b) Thiobacillus thiooxidans c) Rhodospirillum sp. d) Lactobacillus acidophilus e) Desulfovibrio sp. 5) An example of an antimalarial drug: a) Keflex b) ampicillin c) streptomycin d) tetracycline e) artemisinin 6) Bacteria reproduce by the process called: a) meiosis b spontaneous generation c) mitosis d) spontaneous mutation e) binary fission 7) An example of an antiviral agent: a) tetracycline b) griseofulvin© amantadine d) ampicillin e) Keflex 8) An example of a macrolide antibiotic: a) Keflex b) ampicillin C erythromycin d) tetracycline e) gentamycin 9) Name a toxic form of oxygen a) triplet oxygen b singlet oxygen c) peroxide d) a and be) b and c 10) When would you use the most probable number method? a) when the organism is resistant to antibiotics b when the organism cannot grow on agar c) when the organism is sensitive to antibiotics d) when you are counting the organism with a coulter counter 11) The precursor of GMP and AMP a IMP b) orotic acid c) UMP d) tetrahydrofolic acid e) methotrexate ? 12) An example of an organism that could be found growing in jam: a) Bacillus subtilis Xeromyces sp. c) Rhodospirillum sp. d) Ruminococcus sp. 13) Which of the following is not a form of ionizing radiation a) ultraviolet light b) X-rays c) gamma rays d) all the above are forms of ionizing radiation 14) A period of two hours at 160°C is required for killing bacteria: a) in an autoclave b) if free flowing steam is used c in a hot air oven d) if ultraviolet light is used e) in the cavitron 15) Copper has its principal activity against: a) bacterial spores b) organisms that contain chlorophyll c) pathogenic fungi d) viruses that are pretreated with formalin e)pathogenic protozoans 16) Organisms that grow at low temperatures are called: a) halophiles b) basophiles c) thermophiles d) psychrophiles 17) The two most important alcohol germicides are(a) ethanol and methanol b) ethanol and isopropanol c) methanol and butanol d) methanol and isopropanol 18) An inhibitor of nucleotide biosynthesis is: a) penicillin b) aminopterin c) streptomycin d) para amino benzoic acid e) uridine diphosphate 19)A sterilizer that employs superheated steam under pressure is called a(n): a) autoclave b) hot air ovenc) cavitron d) filter e) Petroff Hauser cell 20) Which of the following is a sterilizing gas that can be used on hospital gowns and instruments; a) iodine b) ethylene oxide c) lysol d) merthiolate e) nitrous oxide 21) A pure culture: a) is sterile b)has only one type of organism growing on it c) is made up of clearly defined chemicals d) is pathogenic 22) Coenzyme A plays an important role in the synthesis of: a)amino acids b) orotic acid c) proteins d)lipids e) nucleotides 23) An example of a psychrophilic bacterium: a) Escherichia coli b) Polaromonas vacuolata c) Yersinia entercolitica d) Trypanosoma cruzi e) Pseudomonas aeruginosa 24) Removal of microorganisms from liquids and gases by passing them by passing the material through a substance with pore sizes designed not to allow microorganisms to penetrate: a) tyndalization b) pasteurization c) filtration d) sanitization 25) Beta -galactosidase converts lactose into a glucose and galactose b) glucose c) galactose d) pyruvic acid e) fatty acid 26) An organism that requires oxygen but at lower concentrations than those found in the atmosphere is called a) microaerophilic b) aerobic c) basophilic d) barotolerant 27) An instrument that uses high frequency ultrasonic waves to open cells a) cistron b cavitron c) autoclave d) transposon e) Petroff- Hauser cell 28) NADP is reduced to NADPH in the: a) glycolytic pathway b) pentose phosphate pathway c) glyoxalate cycle d) Entner Douderoff pathway e) Kreb's cycle 29) Organisms that have a narrow range of growth temperatures are said to be: a stenothermal b) eurythermal c) minithermal d) allothermal e) barotolerant 30) The product of gluconeogenesis is: a) acetic acid b) pyruvic acid c) lactic acid d) glucose- 6- PO4 e) butanediol 31) The optimum temperature is usually closer to the minimum temperature than the maximum temperature. a)true b)false 32) A nitrogenous base containing a double ring: a) pyrimidine b) purine c) ribose d) deoxyribose 33) Sulfur is needed by all bacteria. Its main use is: a)in protein b)as energy source c) as a cell wall component d) in nucleic acids 34) the killing of vegetative forms of pathogenic microorganisms on inanimate objects is called: a) disinfection b)antisepsis c)sterilization d)sanitation 35) The enzyme that breaks down starch is called: a) caseinase b) lipase c) starchase d) amylase e) cellulase 36) Organisms that require high salt concentrations to grow are called: a) microaerophillic b) aerobic© halophilic d) barotolerant e) stenothermal 37) This is a reactive halogen element: a) formaldehyde bromine b) phenol c) hydrogen peroxide d) ethylene oxide 38) A growth medium in which all the components and their specific concentrations are known is called a: a) selective media b) complex media c) differential m e d i a defined media e) enriched media 39) Name a cellulase-producing organism. a Actinomyces spp. b) Bacillus subtilis c) Mycobacterium spp d) Niesseria meningitidis e) Escherichia coli 40) Name an organism that can convert fumarate to succinate using anaerobic respiration: a) Methanococcus jannaschii b) Pseudomonas aeruginosa© Enterococcus sp. d) Clostridium perfringens 41) You have just fertilized a field with nitrates. By the end of the year all the nitrates are gone. Name a microorganism that is capable of using these nitrates: a) Mycobacterium smegmatis b ) Pseudomonas denitrificans Neisseria meningitidis d) Rhizobium sp. e) Escherichia coli 42) An organism that contains Beta-galactosidase is: a) Shigella sonnei b) Salmonella typhimurium C Escherichia coli d) Proteus vulgaris 43) The type of bacteria most likely to be found in the anaerobic digestor of a sewage treatment plant: a) Pseudomonas aeruginosa b) Bacillus subtilis c) Cloroflexus sp d) Methanococcus jannaschii 44) This antibiotic is active against rickettsias, chlamydias, and gram-negative bacteria: a) tetracycline b ) sulfanilimide c) penicillind) amphoteracin e) ampicillin 45) Organisms that ignore oxygen and grow equally well in its presence or absence: a) microaerophillic b) strict aerobe c) strict anaerobe d) barotolerante aerotolerant anaerobe 46) Cells may enter the stationary phase of growth because of: a) depletion of an essential nutrient b) lack of available oxygen c) the accumulation of toxic waste d) all of the above 47) You are working on a study of the viable cells in a bacterial suspension. You would count these cells using a coulter counter b) Petroff Hauser cell e) spread plate method d) both a and b 48) Organic molecules that serve as wetting agents and emulsifiers and can be used as disinfectants if they are cationic are called: a) sterilants b ) oxidants© detergents d) iodophores 49) A culture in a closed vessel with a single batch of medium to which no fresh medium is added and no used medium is removed: a) continuous culture b) chemostal CD batch culture d) dilution rate e) molar growth 50) Ultraviolet light damages bacterial cells by affecting the: a) bacterial cell wall b) bacterial DNA c) cell membrane d ) bacterial ribosomes e ) bacterial flagella