Description : The Ames test is used to a. Identify Potential Human Carcinogens. b. Discover Auxotrophic Mutants. c. Find Pathogenic Bacterial Species. d. Identify Antibiotic Resistant Mutants.
Last Answer : a. Identify Potential Human Carcinogens.
Description : Antibiotics will not work against _____ diseases because they lack the structures and metabolic machinery with which antibiotics interfere. a. viral b. bacterial c. fungal d. protozoan
Last Answer : a. viral
Description : What needs to come into consideration when using UV light to sterilize? a. It Needs Direct Exposure b. It Can Cause Skin Cancer c. It May Not Be Effective Against All Kinds Of Endospores d. A-C Are Correct
Last Answer : d. A-C Are Correct
Description : Which of the following diseases result from germination of endospores? a. Pneumonia b. Strep throat c. Meningitis d. Anthrax
Last Answer : d. Anthrax
Description : Bacterial species in fish are naturally adapted to the cold environment in which most fish live and thus, _____ will not affect them; _____ is preferred. a. heating, cooking b. cooling, refrigeration c. warming, boiling d. cooling, freezing
Last Answer : d. cooling, freezing
Description : The majority of bacterial species that cause foodborne and waterborne illnesses in humans are _____. a. Gram-Negative Rods b. Gram-Negative Cocci c. Gram-Positive Rods d. Rods Without A Wall
Last Answer : a. Gram-Negative Rods
Description : The bacterium Deinococcus radiodurans has been of interest to molecular biologists because a. it has the smallest known bacterial genome. b. it is a "living fossil" linking the Bacteria and Archaea. c. it has the largest known bacterial genome. d. it is very resistant to radiation damage.
Last Answer : d. it is very resistant to radiation damage.
Description : Forms hydatid cysts. a. Blood fluke b. Enterobius c. Echinococcus
Last Answer : a. Blood fluke
Description : Syntrophism involves A- exchange of nutrients between two species B- exchange of nutrients among species C- no exchange of nutrients between two species D- no exchange of nutrients among species
Last Answer : exchange of nutrients between two species
Description : When the Exxon Valdez oil spill occurred, technologists "fertilized" the oil-soaked water with _____ to modify the environment and stimulate he growth of naturally occurring microorganisms. a. nitrogen sources (e.g., urea) b. phosphorus compounds c. other mineral nutrients d. A-C above are correct
Last Answer : d. A-C above are correct
Description : The process of conjugation in bacteria requires that _____. a. Two Types Of Viruses Be Present. b. The Conjugating Bacteria Be Deprived Of Nutrients. c. Two Bacteria Exchange Dna. d. Two Live Bacteria Come Together.
Last Answer : d. Two Live Bacteria Come Together.
Description : Consider the following four measures (A-D) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common. (A) Spray with Bordeaux mixture (B) Control of the insect vector of the disease pathogen (C) ... (D) (b) (A) and (D) (c) (B) and (C) (d) (A) and (B)
Last Answer : (b) (A) and (D)
Description : In the soil, antibiotics are produced by some a. Fungal species and viruses. b. Bacterial species and viruses. c. Viruses and helminthic species. d. Fungal and bacterial species.
Last Answer : d. Fungal and bacterial species.
Description : Bacterial leaf blight of rice is caused by a species (a) Alternaria (b) Erwinia (c) Xanthomonas (d) Pseudomonas.
Last Answer : (c) Xanthomonas
Description : The most common cause of an invasive wound infection, such as a burn, is a. gram-positive bacterial species. b. treponema pallidum. c. Pseudomonas aeruginosa. d. Escherichia coli.
Last Answer : c. Pseudomonas aeruginosa.
Description : What bacterial species is most often associated with cystitis? a. Treponemo pallidum b. Escherichia coIi c. Chlamydia trachomatis d. Pseudomonas aeruginosa
Last Answer : b. Escherichia coIi
Description : Which of the following is NOT a condition seen with the development of dental caries? a. A Susceptible Tooth With A Buildup Of Plaque b. Dietary Carbohydrates (Usually Sugar) c. Acidogenic Bacterial Species d. Chewing A Lot Of Gum
Last Answer : d. Chewing A Lot Of Gum
Description : What is the name of the syndrome of fever, abdominal cramps, and bloody mucoid stools caused by Shigella species? a. Bacterial dysentery b. Typhoid fever c. Pseudomembranous colitis d. HUS
Last Answer : a. Bacterial dysentery
Description : Which one of the following bacterial species is NOT a cause of food poisoning (noninflammatory gastroenteritis)? a. Escherichia coli b. Bacillus cereus c. Staphylococcus aureus d. Clostridium perfringens
Last Answer : a. Escherichia coli
Description : Which one of the following statements does NOT apply to dental plaque? a. It is an example of a biofilm. b. It is most noticeable on the molars. c. Its buildup on teeth can lead to gingivitis and periodontal disease. d. It is dominated by aerobic bacterial species.
Last Answer : d. It is dominated by aerobic bacterial species.
Description : The Ames test is an effective procedure for a. Identifying disease-causing bacterial species. b. Detecting potential human carcinogens. c. Determining if DNA replication has occurred. d. Detecting antibiotic resistance.
Last Answer : b. Detecting potential human carcinogens.
Description : Various bacterial species can be subdivided into A- Subspecies B- biovarieties C- Serovarieties D- all of these
Last Answer : all of these
Description : A bacterial species generation time would be determined during the phase. a. decline b. lag c. log d. stationary
Last Answer : c. log
Description : Intracellular organization in bacterial and archaeal species is centered a. Compartmentation of metabolism. b. Growth and reproduction. c. Sensing and responding to environment. d. All the above (A—C) are correct.
Last Answer : d. All the above (A—C) are correct.
Description : Odontogenic cysts develop from the following structures except: A. Reduced enamel epithelium of tooth crown B. Dental lamina dura C. Epithelium trapped after sutures D. ertwig’s root sheath
Last Answer : C. Epithelium trapped after sutures
Description : A bacterial cell that is transformed _____. a. Cannot Form A Conjugation Pilus. b. Has Undergone A Frameshift Mutation. c. Has Acquired Dna From The Environment. d. Will Probably Die Within 24 Hours.
Last Answer : c. Has Acquired Dna From The Environment.
Description : Bacillus subtilis makes a good "bacterial factory" in genetic engineering because _____. a. it normally retains the products it makes b. it is not a human pathogen c. contains endotoxins in it's cell wall d. traditionally ferments sugars
Last Answer : b. it is not a human pathogen
Description : Gentamicin and other aminoglycoside drugs are widely prescribed for treatment of _____ infections. a. fungal b. gram-positive bacterial c. gram-negative bacterial d. staphylococcal
Last Answer : c. gram-negative bacterial
Description : Transformed bacterial cells may display enhanced drug resistances from the acquisition of _____. a. F factors b. M factors c. R factors d. S factors
Last Answer : c. R factors
Description : During the process of lysogeny _____. a. Phage DNA Integrates Into The Bacterial Chromosome. b. A Bacterium Acquires DNA From The External Environment. c. Competent Cells Receive Plasmids. d. New Phage Particles Are Assembled In The Host Bacterium.
Last Answer : a. Phage DNA Integrates Into The Bacterial Chromosome.
Description : During the stationary phase of bacterial growth, the population of living cells is _____ the population of dying cells. a. greater than b. smaller than c. equal to d. increasing faster than
Last Answer : c. equal to
Description : Reproduction in bacterial cells occurs by the sequence of events known as _____. a. mitosis b. binary fission c. selfing d. budding
Last Answer : b. binary fission
Description : The _____ microscope would be used to view cell structures within ultrathin sections of cells. a. scanning electron b. transmission electron c. bright-field d. dark-field
Last Answer : b. transmission electron
Description : Capsules are similar to pili because both a. Contain DNA. b. Are made of protein. c. Contain dextran fibers. d. Permit attachment to surfaces.
Last Answer : d. Permit attachment to surfaces.
Description : Traveler's diarrhea is most often caused by a species of _____. a. Salmonella b. Vibrio c. Escherichia d. Listeria
Last Answer : c. Escherichia
Description : Psychrophilic bacteria species grow well at 10 degrees C, while mesophilic bacteria species grow well at _____ degrees C. a. 37 b. 50 c. 75 d. 98
Last Answer : a. 37
Description : The second word in a species name is referred to as the _____. a. genus b. order c. specific epithet d. biotype
Last Answer : c. specific epithet
Description : A _____ is a communal association of microbes. a. Domain b. Biofilm c. Division d. Species
Last Answer : b. Biofilm
Description : Cancer cells interfere with cell functions in all the following ways except: a. they rob cells of their nutrients and induce cell starvation. b. they stimulate the immune system to produce destructive ... reduce the oxygen supply to cells. d. they overwhelm cells through sheer force of numbers.
Last Answer : b. they stimulate the immune system to produce destructive interferons.
Description : Exponential phase of growth curve of bacteria is of limited duration because of A.rise in cell density B.accumulation of toxic metabolites C.exhaustion of nutrients D.all of these
Last Answer : D.all of these
Description : What is the function of the cell envelope? a. growth and reproduction b. protection from osmotic pressure c. sensing and responding to the environment d. acquiring nutrients
Last Answer : b. protection from osmotic pressure
Description : What are endospores?
Last Answer : Some bacteria, especially bacilli under unfavorable Endospores is a ting structure containing DNA, small portion of cytoplasm and a tough protective coat and can survive unfavorable conditions for may years.
Description : Why are slime molds considered to resemble plants? A.They can photosynthesize B.Theyhave cell walls composed largely of cellulose C.They form a threadlike structure D.They form structures that resemble leaves
Last Answer : B.Theyhave cell walls composed largely of cellulose
Last Answer : Theyhave cell walls composed largely of cellulose