How do some cyanobacteria fix nitrogen while growing aerobically?

How do some cyanobacteria fix nitrogen while growing aerobically? a. they don't because nitrogenase is destroyed by oxygen b. by using special cells...

Some bacteria form environmentally resistant forms called __________.

Some bacteria form environmentally resistant forms called __________. a. endospores b. heterocysts c. colonies d. hyphae e. actinomycetes Answe...

Which of the following genera does NOT undergo differentiation?

Which of the following genera does NOT undergo differentiation? a. Anabaena b. Bacillus c. Clostridium d. Escherichia e. Streptomyces Answer:&n...

During biofilm formation, as more and more cells bind to the surface, they begin sending signals to each other in a process called

During biofilm formation, as more and more cells bind to the surface, they begin sending signals to each other in a process called a. quorum sensing b....

Which of the following is true of all biofilms?

Which of the following is true of all biofilms? a. They only contain a single species. b. The EPS may be protein or polysaccharide. c. Cells in the...

Eukaryotic microorganisms enter the __________ phase at much lower cell numbers than bacteria simply because they are bigger than bacteria.

Eukaryotic microorganisms enter the __________ phase at much lower cell numbers than bacteria simply because they are bigger than bacteria. a. lag b....

You are measuring growth in a bacterial culture. The number of viable cells remains constant, and when you check the medium, you find that the carbon source has been used up. What phase of growth is the culture in?

You are measuring growth in a bacterial culture. The number of viable cells remains constant, and when you check the medium, you find that the carbon...

E. coli adjusts to the stationary phase by doing all of the following except:

E. coli adjusts to the stationary phase by doing all of the following except: a. decrease its size b. synthesize enzymes to handle oxygen radicals c....

Quorum sensing begins during which growth stage?

Quorum sensing begins during which growth stage? a. lag b. early log c. late log d. stationary e. death Answer: Late l...

During which stage of bacterial growth is the culture growing exponentially?

During which stage of bacterial growth is the culture growing exponentially? a. lag b. early log c. late log d. stationary e. death Answer: Early...

In which case would the shortest lag period most likely be observed?

In which case would the shortest lag period most likely be observed? a. transfer from complex medium to fresh complex medium b. transfer from complex...

The time between inoculation and the beginning of growth is usually called the:

The time between inoculation and the beginning of growth is usually called the: a. lag phase b. early log phase c. late log phase d. stationary phase e....

If an organism produces seven offspring per generation, which of the following would express the rate of increase in population, where n corresponds to the number of generations?

If an organism produces seven offspring per generation, which of the following would express the rate of increase in population, where n corresponds...

The time interval required for the formation of two cells from one is called the

The time interval required for the formation of two cells from one is called the a. generation time b. growth time c. growth rate d. exponential Answer: Generation...

A cafeteria worker who fails to wash his hands thoroughly and fails to wear gloves inoculates a quiche with 4 E. coli when he uses his finger to test whether it is done. By the time you purchase the quiche, there are 128 E. coli cells in it. How many generations did the cells go through?

A cafeteria worker who fails to wash his hands thoroughly and fails to wear gloves inoculates a quiche with 4 E. coli when he uses his finger to test...

Growth of most microorganisms occurs by:

Growth of most microorganisms occurs by: a. budding b. binary fission c. replication d. conjugation e. transformation Answer: Binary fissi...

____ cells are free-living organisms that grow and multiply on their own.

____ cells are free-living organisms that grow and multiply on their own. a. Endospores b. Parasites c. Symbionts d. Planktonic e. Heterocyst A...

What type of growth pattern is represented here: 5 × 103; 1 × 104; 2 × 104; 4 × 104; 8 × 104?

What type of growth pattern is represented here: 5 × 103; 1 × 104; 2 × 104; 4 × 104; 8 × 104? a. linear b. exponential c. lag d. generation e. se...

When the population doubles during each given unit of time the growth is

When the population doubles during each given unit of time the growth is a. linear b. semilogarithmic c. exponential d. geometric e. arithmetic ...

A problem with __________ of cell number is that dead cells also scatter light.

A problem with __________ of cell number is that dead cells also scatter light. a. direct microscopic counts b. viable counts c. spread plate counts d....

Which of the following is the best technique for counting only viable cells?

Which of the following is the best technique for counting only viable cells? a. direct microscopic count b. spread plate c. spectrophotometer d. chemostat e....

______ intercalates between DNA bases, causing dead cells to stain red under a fluorescence scope.

______ intercalates between DNA bases, causing dead cells to stain red under a fluorescence scope. a. Propidium iodide b. Syto-9 c. Ethidium bromide d....

All of the following are true about MacConkey medium except:

All of the following are true about MacConkey medium except: a. It is selective. b. It is differential. c. It is both selective and differential. d....

Metabolism of a microbe is best examined by growing the organism in a:

Metabolism of a microbe is best examined by growing the organism in a: a. defined medium b. complex medium c. spread plate d. pour plate e. cell culture Answer: Defined...

Which term refers to the condition in which a culture covers the entire plate surface?

Which term refers to the condition in which a culture covers the entire plate surface? a. dilution streaking b. spread plate c. confluent d. microcolony e....

The best method to isolate single colonies is the __________ plate and the best method to count colonies is the __________ plate.

The best method to isolate single colonies is the __________ plate and the best method to count colonies is the __________ plate. a. spread; pour b....

The most widely used solidifying agent is __________, which is derived from seaweed.

The most widely used solidifying agent is __________, which is derived from seaweed. a. agar b. gelatin c. starch d. cellulose e. glycogen Answ...

Which of the following statements is false about the E. coli phosphotransferase system (PTS)?

Which of the following statements is false about the E. coli phosphotransferase system (PTS)? a. The EnzI complex in the cytoplasm is shared between...

Which form of transport occurs only in prokaryotes?

Which form of transport occurs only in prokaryotes? a. facilitated diffusion b. ABC transport c. siderophores d. group translocation e. endocytosis Answer: Group...

Siderophore-iron complexes enter cells with the help of:

Siderophore-iron complexes enter cells with the help of: a. porins b. diffusion c. aquaporins d. ABC transporters e. efflux pumps Answer: ABC...

When the intracellular iron concentration is low, iron-scavenging molecules called __________ are produced.

When the intracellular iron concentration is low, iron-scavenging molecules called __________ are produced. a. siderophores b. endospores c. heterocysts d....

Which of the following is NOT true about the substrate binding protein (SBP) of the ABC transport system?

Which of the following is NOT true about the substrate binding protein (SBP) of the ABC transport system? a. It is found in the periplasm of Gram-negative...

Which of the following proteins represents a coupled transport system where two molecules travel in the same direction?

Which of the following proteins represents a coupled transport system where two molecules travel in the same direction? a. aquaporin b. symport c....

A __________ cell loses membrane integrity and cannot carry out the simple transport functions needed to support life.

A __________ cell loses membrane integrity and cannot carry out the simple transport functions needed to support life. a. depolarized b. endospore c....

You have isolated a bacterium from the rumen of a cow and wish to know how it transports glucose into the cell. You perform an experiment that shows uptake of radioactively labeled glucose is equal when the organism is grown in media in the presence and absence of inhibitors of energy production. What is the mechanism of glucose transport in this cell?

You have isolated a bacterium from the rumen of a cow and wish to know how it transports glucose into the cell. You perform an experiment that shows...

Which form of transport occurs only in eukaryotes?

Which form of transport occurs only in eukaryotes? a. facilitated diffusion b. ABC transport c. siderophores d. group translocation e. endocytosi...

The majority of nitrogen in soil and marine environments is fixed by:

The majority of nitrogen in soil and marine environments is fixed by: a. free-living bacteria b. symbionts c. E. coli d. biofilm organisms e. UV light Answer: Free-living...

A __________ is an organism that lives in a close and mutually beneficial association with a second organism.

A __________ is an organism that lives in a close and mutually beneficial association with a second organism. a. commensal b. parasite c. heterocyst d....

______ form the base of the marine food chain.

______ form the base of the marine food chain. a. Protists b. Small fish c. Sunlight d. Cyanobacteria e. Heterotrophs Answer: Cyanobacter...

________ are responsible for the carbon fixation component of the carbon cycle.

________ are responsible for the carbon fixation component of the carbon cycle. a. Heterotrophs b. Symbionts c. Autotrophs d. Chemotrophs e. Orga...

By themselves, heterotrophs would deplete the world of __________ sources and starve to death.

By themselves, heterotrophs would deplete the world of __________ sources and starve to death. a. usable nitrogen b. organic carbon c. water d. energy e....

All of Earth's life-forms are based on:

All of Earth's life-forms are based on: a. hydrogen b. nitrogen c. oxygen d. carbon e. phosphorus Answer: carb...

All known microorganisms have a set of genes coding for __________, whose DNA sequences are highly conserved across the phylogenetic tree.

All known microorganisms have a set of genes coding for __________, whose DNA sequences are highly conserved across the phylogenetic tree. a. ribosomes b....

______ are specific nutrients that are NOT required by all cells.

______ are specific nutrients that are NOT required by all cells. a. Macronutrients b. Micronutrients c. Growth factors d. Trace elements e. Essential...

Which of the following represents small molecules that fit into specific enzymes and aid in the catalytic process?

Which of the following represents small molecules that fit into specific enzymes and aid in the catalytic process? a. essential nutrients b. macronutrients c....

Which of the following is a micronutrient?

Which of the following is a micronutrient? a. carbon b. nitrogen c. sulfur d. calcium e. zinc Answer: zi...

In the laboratory Escherichia coli can divide into two cells every:

In the laboratory Escherichia coli can divide into two cells every: a. 1-5 minutes b. 5-10 minutes c. 20-30 minutes d. 50-60 minutes e. 2 hours Answer: 20-30...

____ can consume glucose and, in the absence of oxygen, can break it down into ethanol and carbon dioxide gas.

____ can consume glucose and, in the absence of oxygen, can break it down into ethanol and carbon dioxide gas. a. E. coli b. Phototrophs c. Yeast d....

A microbial population explosion results from the sudden availability of:

A microbial population explosion results from the sudden availability of: a. water b. oxygen c. food d. sunlight e. prey Answer: fo...

Microorganisms constantly struggle to survive in natural habitats because of the competition for:

Microorganisms constantly struggle to survive in natural habitats because of the competition for: a. food b. sunlight c. water d. oxygen e. miner...

The analysis of microbial strains as evidence in criminal investigation is known as:

The analysis of microbial strains as evidence in criminal investigation is known as: a. forensic microbiology b. recombinant DNA c. comparative genomics d....

The study of and cause of disease in humans, animals, and plants is called

The study of and cause of disease in humans, animals, and plants is called a. microbiology b. phylogeny c. genomics d. epidemiology e. forensics ...

Taq polymerase formed the basis of a multibillion-dollar industry of

Taq polymerase formed the basis of a multibillion-dollar industry of a. comparative genomics b. recombinant DNA c. X-ray diffraction d. DNA amplification e....

Which scientist first discovered the process of transformation?

Which scientist first discovered the process of transformation? a. Francis Crick b. Robert Koch c. Edward Jenner d. Louis Pasteur e. Frederick Griffith Answer: Frederick...

What type of analysis was used to discover the overall structure of the DNA double helix?

What type of analysis was used to discover the overall structure of the DNA double helix? a. microscopy b. X-ray diffraction c. Polymerase chain reaction d....

The Asilomar Conference was held to regulate and restrict the field of

The Asilomar Conference was held to regulate and restrict the field of a. recombinant DNA b. comparative genomics c. DNA sequencing d. DNA amplification e....

The X-ray diffraction studies by which of the following scientists concluded that DNA was a double helix?

The X-ray diffraction studies by which of the following scientists concluded that DNA was a double helix? a. James Watson b. Rosalind Franklin c....

What is used to focus the beam of electrons in an electron microscope?

What is used to focus the beam of electrons in an electron microscope? a. electromagnets b. condenser lens c. light rays d. X-ray diffraction e. ...

How are microbes classified today?

How are microbes classified today? a. comparative genomics b. microscopy c. X-ray diffraction d. DNA sequencing e. rRNA sequencing Answer: rRNA...

Carl Woese's discovery replaced the classification scheme of five kingdoms with the scheme of three

Carl Woese's discovery replaced the classification scheme of five kingdoms with the scheme of three a. phyla b. domains c. classes d. orders e. g...

In the thee-domain model, the bacterial ancestor of chloroplasts derives from ancient

In the thee-domain model, the bacterial ancestor of chloroplasts derives from ancient a. fungi b. cyanobacteria c. proteobacteria d. archaea e. p...

Which of the following organelles are thought to be prokaryotic origins?

Which of the following organelles are thought to be prokaryotic origins? a. chloroplasts b. mitochondria c. nucleus d. chloroplast and mitochondria e....

The three-domain model, the bacterial ancestor of mitochondria derives from ancient

The three-domain model, the bacterial ancestor of mitochondria derives from ancient a. fungi b. cyanobacteria c. proteobacteria d. archaea e. pro...

The genetic expression machinery of arches is most similar to

The genetic expression machinery of arches is most similar to a. monera b. prokaryotes c. bacteria d. eukaryotes e. mitochondria Answer: e...

Which group of microorganisms include many that grow in extreme environments?

Which group of microorganisms include many that grow in extreme environments? a. algae b. bacteria c. protists d. archaea e. fungi Answer: ...

Organisms which live symbiotically led inside a larger organism are known as

Organisms which live symbiotically led inside a larger organism are known as a. organelles b. cyanobacteria c. mitochondria d. endosymbionts e. c...

How did Sergei Winogradsky grow lithographs?

How did Sergei Winogradsky grow lithographs? a. enrichment culture b. aseptic technique c. pure culture d. endosymbiosis e. chain of infection Answer: enrichment...

Which type of compounds have a sting tendency to accept electrons?

Which type of compounds have a sting tendency to accept electrons? a. oxidized b. reduced c. neutral d. protons e. neutrons Answer: reduc...

Early metabolism may have been catalyzed by

Early metabolism may have been catalyzed by a. DNA b. RNA c. protein d. amino acids e. carbohydrates Answer: R...

Which microbes may resemble those of the earliest life forms?

Which microbes may resemble those of the earliest life forms? a. archaea b. photosynthetic microbes c. viruses d. cyanobacteria e. protists Ans...

The development of the theory of the "RNA world" resulted from the discovery of

The development of the theory of the "RNA world" resulted from the discovery of a. archaea b. prions c. bacteria d. ribozymes e. endosymbionts ...

The environment of early Earth may have contained all EXCEPT

The environment of early Earth may have contained all EXCEPT a. ferrous iron b. methane c. ammonia d. oxygen e. hydrogen gas Answer: oxyg...

Which of the following does NOT contain DNA or RNA?

Which of the following does NOT contain DNA or RNA? a. prokaryote b. eukaryote c. virus d. viroid e. prion Answer: prion ...

All of the following are true about penicillin EXCEPT

All of the following are true about penicillin EXCEPT a. It was discovered by Alexander Fleming. b. It was an accidental discovery. c. It is produced...

Which of the following can safely be ingested to fight bacterial infections?

Which of the following can safely be ingested to fight bacterial infections? a. antiseptics b. disinfectants c. phenol d. chlorine e. antibiotics...

Penicillin was first used to save the lives of many people during which war?

Penicillin was first used to save the lives of many people during which war? a. Civil War b. Korean War c. Vietnam War d. World War I e. World War...

What is the basis for the modern smallpox vaccine?

What is the basis for the modern smallpox vaccine? a. chickenpox virus b. cowpox virus c. rabies virus d. smallpox virus e. anthrax Answer: cowpox...

The word "vaccination" is derived from the Latin word vacca which means

The word "vaccination" is derived from the Latin word vacca which means a. inject b. smallpox c. immunize d. cow e. pustule Answer: c...

It took the advent of the PCR to detect the presence of the causative agent for which disease?

It took the advent of the PCR to detect the presence of the causative agent for which disease? a. anthrax b. tuberculosis c. AIDS d. rabies e. sm...

You have isolated a bacterium that you believe to be the causative agent of a new disease in frogs. How would you test the third of Koch's postulates?

You have isolated a bacterium that you believe to be the causative agent of a new disease in frogs. How would you test the third of Koch's postulates? a....

Robert Koch's greatest accomplishment in the field of medical bacteriology was with

Robert Koch's greatest accomplishment in the field of medical bacteriology was with a. Escherichia coli b. Bacillus subtilis c. Mycobacterium tuberculosis d....

The use of agar as the gelling agent in solid media was suggested by

The use of agar as the gelling agent in solid media was suggested by a. Robert Koch b. Ignaz Semmelweis c. Angelina Hesse d. Louis Pasteur e. Richard...

How is most sterilization performed for the controlled study of microbes?

How is most sterilization performed for the controlled study of microbes? a. boiling b. pasteurization c. filter sterilization d. autoclaving e. ...

Suppose Pasteur's swan-necked flasks containing boiled broth became cloudy 24 hours after boiling. Which choice could best explain the turbidity or cloudiness in the broth without supporting spontaneous generation?

Suppose Pasteur's swan-necked flasks containing boiled broth became cloudy 24 hours after boiling. Which choice could best explain the turbidity or...

The first person to visualize individual microbes was

The first person to visualize individual microbes was a. Antoni van Leeuwenhoek b. Robert Hooke c. Louis Pasteur d. Lady Montagu e. Edward Jenner Answer: Antoni...

Which technique was developed to distinguish bacteria from human cells?

Which technique was developed to distinguish bacteria from human cells? a. Gram stain b. electron microscopy c. X-ray diffraction d. DNA sequencing e....

Who developed the concept of medical statistics?

Who developed the concept of medical statistics? a. Francis Crick b. Florence Nightingale c. Edward Jenner d. Louis Pasteur e. Alexander Fleming Answer: Florence...

How did European invaders to North America kill much of the native population?

How did European invaders to North America kill much of the native population? a. tuberculosis b. leprosy c. smallpox d. HIV e. bubonic plague ...

All of the following have been found in mummies and tomb art EXCEPT:

All of the following have been found in mummies and tomb art EXCEPT: a. tuberculosis b. polio c. leprosy d. smallpox e. prions Answer: pri...

Which century is known as the golden age of microbe?

Which century is known as the golden age of microbe? a. the seventeenth b. the eighteenth c. the nineteenth d. the twentieth e. the twenty-first ...

The first genomes to be sequenced were those of

The first genomes to be sequenced were those of a. humans b. bacteria c. viruses d. prions e. fungi Answer: virus...

Which of these groups are considered to be microbes but NOT considered to be cells?

Which of these groups are considered to be microbes but NOT considered to be cells? a. viruses b. bacteria c. archaea d. protists e. prions Ans...

The presence of _____ on Mars today would increase the chance that microbial life exists there.

The presence of _____ on Mars today would increase the chance that microbial life exists there. a. liquid water b. oxygen c. nitrogen gas d. ammonia e....

Which of theses is currently the number one cause of human mortality?

Which of theses is currently the number one cause of human mortality? a. cardiovascular disease b. cancer c. accidents d. microbial disease e. strokes Answer: microbial...

What percentage of microbes in our biosphere can be cultures in the lab?

What percentage of microbes in our biosphere can be cultures in the lab? a. less than 1% b. approximately 10% c. approximately 25% d. approximately...

Bacteria that produce enzymes used in the polymerase chain reaction were isolated from:

Bacteria that produce enzymes used in the polymerase chain reaction were isolated from: a. lake water b. ocean c. soil d. intestines e. hot springs Answer: hot...

What type of gas do cyanobacteria produce for planet Earth?

What type of gas do cyanobacteria produce for planet Earth? a. oxygen b. hydrogen c. nitrogen d. carbon dioxide e. water vapor Answer: oxy...

What are the primary producers of major food webs?

What are the primary producers of major food webs? a. plants b. microbes c. animals d. fungi e. viruses Answer: microb...

A human body contains ______ times as many microbes as it does human cells.

A human body contains ______ times as many microbes as it does human cells. a. 2 b. 5 c. 10 d. 50 e. 100 Answer: ...

The eukaryotic predators of the microscopic world are:

The eukaryotic predators of the microscopic world are: a. viruses b. bacteria c. algae d. cyanobacteria e. protists Answer: Protis...

Legionella is transmitted by

Legionella is transmitted by A) airborne transmission. B) foodborne transmission. C) person-to-person contact. D) fomites. E) vectors Answer: airborne...

Which one of the following produces small "fried-egg" colonies on medium containing horse serum and yeast extract?

Which one of the following produces small "fried-egg" colonies on medium containing horse serum and yeast extract? A) Chlamydophila B) Legionella C)...

Which of the following is NOT an intracellular parasite?

Which of the following is NOT an intracellular parasite? A) Chlamydophila B) Coccidioides C) Coxiella D) Influenza virus E) RSV Answer: Co...

Which of the following is responsible for epidemics of respiratory disease in infants?

Which of the following is responsible for epidemics of respiratory disease in infants? A) rhinovirus B) adenovirus C) respiratory syncytial virus D)...

A patient has fever, difficulty breathing, chest pains, fluid in the alveoli, and a positive tuberculin skin test. Gram-positive cocci are isolated from the sputum. The patient most likely has

A patient has fever, difficulty breathing, chest pains, fluid in the alveoli, and a positive tuberculin skin test. Gram-positive cocci are isolated...

A patient who presents with red throat and tonsils can be diagnosed as having

A patient who presents with red throat and tonsils can be diagnosed as having A) streptococcal pharyngitis. B) scarlet fever. C) diphtheria. D) the...

A patient has a paroxysmal cough and mucus accumulation. What is the etiology of the symptoms?

A patient has a paroxysmal cough and mucus accumulation. What is the etiology of the symptoms? A) Bordetella B) Corynebacterium C) Burkholderia D)...

Which of the following statements regarding tuberculosis is FALSE?

Which of the following statements regarding tuberculosis is FALSE? A) Nearly 1/3 of the world's population is infected with tuberculosis. B) Nearly...

Microscopic examination of a lung biopsy shows spherules. What is the etiology of the symptoms?

Microscopic examination of a lung biopsy shows spherules. What is the etiology of the symptoms? A) Blastomyces B) Coccidioides C) Histoplasma D) Mycobacterium E)...

Microscopic examination of a lung biopsy shows thick-walled cysts. What is the etiology of the symptoms?

Microscopic examination of a lung biopsy shows thick-walled cysts. What is the etiology of the symptoms? A) Blastomyces B) Coccidioides C) Histoplasma D)...

All of the following are classified as fungi EXCEPT

All of the following are classified as fungi EXCEPT A) Blastomyces. B) Coccidioides. C) Histoplasma. D) Mycobacterium. E) Pneumocystis Answer:&...

Which of the following is mismatched?

Which of the following is mismatched? A) Burkholderia — melioidosis B) Coxiella — Q fever C) Mycoplasma — walking pneumonia D) Chlamydophila — psittacosis E)...

The patient is suffocating because of the accumulation of dead tissue and fibrin in her throat. What is the etiology of the symptoms?

The patient is suffocating because of the accumulation of dead tissue and fibrin in her throat. What is the etiology of the symptoms? A) Corynebacterium B)...

The patient has a sore throat. What is the etiology of the symptoms?

The patient has a sore throat. What is the etiology of the symptoms? A) Corynebacterium B) Rhinovirus C) Bordetella D) Streptococcus E) The answer...

The patient is suffocating because of an inflamed epiglottis. What is the etiology of the symptoms?

The patient is suffocating because of an inflamed epiglottis. What is the etiology of the symptoms? A) Corynebacterium B) Haemophilus C) Bordetella D)...

A patient has pneumonia. Gram-negative rods are cultured on nutrient agar from a sputum sample. The etiology is

A patient has pneumonia. Gram-negative rods are cultured on nutrient agar from a sputum sample. The etiology is A) Burkholderia pseudomallei. B) Chlamydophila...

Soil is a reservoir for all of the following EXCEPT

Soil is a reservoir for all of the following EXCEPT A) Q fever. B) melioidosis. C) blastomycosis. D) histoplasmosis. E) coccidioidomycosis Answer: Q...

Inhalation of arthroconidia is responsible for infection by which of the following organisms?

Inhalation of arthroconidia is responsible for infection by which of the following organisms? A) Blastomyces B) Coccidioides C) Mycoplasma D) Streptococcus E)...

Which one of the following causes a disease characterized by a red rash?

Which one of the following causes a disease characterized by a red rash? A) Blastomyces B) Coccidioides C) Mycoplasma D) Streptococcus E) RSV A...

All of the following are used as first-line drugs for treating tuberculosis EXCEPT

All of the following are used as first-line drugs for treating tuberculosis EXCEPT A) ethambutol. B) isoniazid. C) fluoroquinolones. D) rifampin. E)...

The primary victims of the influenza pandemic of 1918-1919 were

The primary victims of the influenza pandemic of 1918-1919 were A) members of the military. B) infants and the elderly. C) residents of Spain; therefore,...

Infection by which of the following is often confused with viral pneumonia?

Infection by which of the following is often confused with viral pneumonia? A) Blastomyces B) Coccidioides C) Mycoplasma D) Streptococcus E) Myco...

Which of the following etiologic agents results in the formation of abscesses?

Which of the following etiologic agents results in the formation of abscesses? A) Staphylococcus B) Mycoplasma C) Streptococcus D) Blastomyces E)...

Which of the following is an opportunistic pathogen?

Which of the following is an opportunistic pathogen? A) Pneumocystis B) Legionella C) Histoplasma D) Mycoplasma E) rhinovirus Answer: Pneu...

The most effective means of preventing influenza is

The most effective means of preventing influenza is A) annual vaccination. B) isolation of carriers. C) vector control. D) pasteurization of milk. E)...

Which one of the following produces the most potent exotoxin?

Which one of the following produces the most potent exotoxin? A) Bordetella pertussis B) Corynebacterium diphtheriae C) Mycobacterium tuberculosis D)...

Infection by which of the following results in the formation of Ghon complexes?

Infection by which of the following results in the formation of Ghon complexes? A) Bordetella pertussis B) Corynebacterium diphtheriae C) Mycobacterium...

Which one of the following is an irregular, gram-positive rod?

Which one of the following is an irregular, gram-positive rod? A) Bordetella pertussis B) Corynebacterium diphtheriae C) Burkholderia pseudomallei D)...