Intro to MicroBio {Part A}

__________ bacteria require living or dead organic matter for food and are pathogenic. a. microaerophillic b. aerobic c. heterotrophic d. autotrophic

. heterotrophic

Which of the following are nucleic acids within shells of protein, can only reproduce when they are within the living cells of a host organism, and the severity of the disease depends on the type of cells that are infected? a. protozoa b. parasites c. bacteria d. viruses

. viruses

Which type of toxin produced by bacteria are liberated only when the bacterial cell dies and disintegrates, are contained in bacterial cell walls, and cause typhoid fever? a. andotoxin b. amino-toxin c. exotoxin d. heterotrophic toxin

a. andotoxin

Which of the following statements is false concerning exotoxins? a. cause bacillary dysentery b. are the most potent toxins known c. produce most of the characteristic symptoms and lesions of the disease d. cause diphtheria

a. cause bacillary dysentery

Which of the following is not a major class of microorganism? a. class b. bacteria c. viruses d. fungi

a. class

According to the taxonomy system for classifying organisms, which of the following is the highest listed level? a. kingdom b. family c. class d. species

a. kingdom

What are microscopic plant life such as bacteria which are adapted to residing in a given area of the body during health called? a. normal flora b. parasitic flora c. transient flora d. resident flora

a. normal flora

Which infectious agent, unlike other infectious agents, must contain either RNA, DNA, or both? a. prion b. bacterium c. viroid d. protozoan

a. prion

Which of the following statements is true concerning bacteria? a. reproduce by binary fission b. are multicellular c. anaerobic species require that oxygen be present in order to reproduce d. only about 200 species produce disease in human beings

a. reproduce by binary fission

Which of the following diseases is not an example of a neurotrophic disease? a. shingles b. rabies c. polio d. encephalitis

a. shingles

Which of the following is the lowest level in the taxonomy system? a. species b. phylum c. order d. kingdom

a. species

Viruses of human beings and animals are generally __________. a. spherical in shape b. capsule-shaped c. rod-shaped d. circular in shape

a. spherical in shape

What does Bordetella pertussis cause? a. whooping cough b. typhoid fever c. pneumonia d. tuberculosis

a. whooping cough

What are helminths commonly called? a. worms b. bugs c. yeast d. mold

a. worms

Which of the following is caused by Entamoeba histolytica? a. trichomonas infections b. amebic dysentery c. giardiasis d. malaria

b. amebic dysentery

Which of the following statements is true of rickettsiae? a. are much larger than bacteria, but smaller than viruses b. are parasites c. can only grow outside living cells d. are transmitted to humans through the air

b. are parasites

Which of the following statements is false concerning fungi? a. include yeasts and molds b. contain chlorophyl c. contain over 100,000 species d. are in the plant kingdom

b. contain chlorophyl

Which of the following are specialized structures of bacteria that are hairlike processes that cause the bacteria to move along in liquid by their wavelike rhythmic contractions? a. pathogenic b. flagella c. capsules d. spores

b. flagella

Which of the following is not a growth requirement of bacteria? a. moisture b. light c. darkness d. food

b. light

Squirrels and songbirds that live in the same tree are examples of which type of microbial relationship? a. antibiosis b. neutralism c. symbiosis d. commensalism

b. neutralism

Question 290 / 1 point What does Pseudomonas aeruginosa cause? a. tetanus b. severe wound infections c. whooping cough d. gas gangrene

b. severe wound infections

Which of the following are specialized structures of bacteria that are inactive, are not reproductive forms, and resist drying and most chemical disinfectants? a. capsules b. spores c. pathogenic d. flagella

b. spores

Which of the following statements is false concerning bacteria? a. reproduce by binary fission b. thin outer cell wall provides its shape c. are simple organisms d. produce diseases in humans

b. thin outer cell wall provides its shape

Which of the following statements is false concerning neutral pH as a growth requirement of bacteria? a. most bacteria grow best slightly on the alkaline side of the pH scale b. vinegar is acidic and may be used to increase bacterial growth c. both acids and alkalis are harmful to bacteria d. most bacteria grow best close to the neutral point on the pH scale

b. vinegar is acidic and may be used to increase bacterial growth

Which class of microorganism is subcellular and reproduces as a parasite within other organisms? a. bacterium b. virus c. fungus d. protozoan

b. virus

Which of the following strains of bacteria causes food poisoning? a. Salmonella typhi b. Streptococcus pyogenes c. Staphylococci d. Staphylococcus aureus

c. Staphylococci

Which of the following statements is algae concerning algae? a. infestation generally occurs as a result of break in skin b. contains chlorophyl c. are only unicellular d. can produce its own nourishment in the presence of light

c. are only unicellular

Which of the following are rod or cylinder shaped bacteria? a. spirilla b. spirochetes c. bacillus d. coccus

c. bacillus

Which specialized structure of bacteria increases the virulence of bacteria? a. flagella b. spores c. capsules d. bacillus

c. capsules

Which of the following statements is true concerning molds? a. are unicellular, microscopic organisms b. reproduce by budding c. causes ringworm of the foot d. some may be seen on food such as meats and vegetables

c. causes ringworm of the foot

What term is used to describe a capsule that forms around microorganisms before they enter dormant periods? a. protozoa b. speudopod c. cyst d. cilia

c. cyst

Which of the following terms is defined as having the capability to live under certain environmental circumstances and having the ability to adapt to more than one condition? a. anaerobe b. host c. facultative d. culture

c. facultative

Which of the following is not an example of a gram-positive bacteria? a. streptococcus b. clostridium c. proteus d. staphylococcus

c. proteus

Which of the following are unicellular, simple forms of animal life, microscopic, and reproduce sexually or asexually by fission? a. algae b. mold c. protozoa d. yeast

c. protozoa

Which of the following statements is true concerning yeast? a. causes ringworm of the scalp b. reproduce by spores c. some are used commercially in preparing beer, wine and bread d. are multicellular

c. some are used commercially in preparing beer, wine and bread

What is a relationship between two organisms that have close contact with each other called? a. actuary b. antibiosis c. symbiosis d. commensalism

c. symbiosis

What are organisms that take up residence in or on the body temporarily in a location where they are not normally found called? a. parasitic flora b. resident flora c. transient flora d. normal flora

c. transient flora

What are spiral or curved forms of bacteria called? a. spore b. diplococci c. vibrio d. streptobacilli

c. vibrio

What is the smallest organism known? a. fungi b. bacteria c. virus d. algae

c. virus

Which of the following statements is true of thrush? a. seen commonly in newborn infected by the mother b. infects mucous membranes of the mouth c. caused by common yeast mycosis called Candida albicans d. all of the above

d. all of the above

What do roundworms, pinworms, hookworms, and trichinella have in common? a. are all types of viruses b. are all common bacteria that afflicts animals c. are all types of protozoa d. are all common parasites that afflicts humans

d. are all common parasites that afflicts humans

Which of the following statements is false concerning helminths? a. are transmitted through fecal contamination or by eating uncooked meat b. live off nutrients in the host's body c. are the largest organism responsible for human disease d. are unicellular animal parasites

d. are unicellular animal parasites

What is the laboratory technique used to identify bacteria which consists of staining bacteria with a violet stain and then counterstaining called? a. culture b. alpha-chymar stain c. gram-positive bacteria stain d. gram stain

d. gram stain

Which of the following is transmitted by the bite of a female Anopheles mosquito? a. chicken pox b. giardiasis c. amoebic dysentery d. malaria

d. malaria

Viral pneumonia is an example of what type of virus that affects the respiratory tract? a. viscerotropic b. immunotrophic c. neurotrophic d. pneumotrophic

d. pneumotrophic

What type of bacteria are characterized by chain formation? a. diplococci b. staphylococci c. diplobacilli d. streptococci

d. streptococci

Which of the following is a dermotrophic virus? a. AIDS b. rabies c. coryza d. varicella virus

d. varicella virus

Mumps is an example of what type of virus? a. immunotrophic b. neurotrophic c. pneumotrophic d. viscerotrophic

d. viscerotrophic

Which class of microorganism in its parasitic form can be pathogenic to humans? a. protozoan b. bacterium c. fungus d. worm

d. worm

What illness is caused by Rickettsia ricketsii? a. epidemic typhus b. flea-born typhus c. endemic typhus d.Rocky Mountain spotted fever

d.Rocky Mountain spotted fever