Question 1
Correct
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Each of the following is inoculation of normal biota to a newborn except .
Select one:
a. All of the
... [Show More] choices are correct.
b. contact with hospital staff
c. the birth process through the birth canal
d. breastfeeding
e. bottle feeding
Question 2
Correct
4.17 points out
of 4.17
Resident biota are found in/on the .
Select one:
a. All of the choices are correct.
b. large intestine
c. mouth
d. nasal passages
e. skin
Straighterline BIO250 Microbiology Graded Exam 3 (New Version June 2024)
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Grade 125.00 out of 125.00 (100%)Question 4
Correct
4.17 points out
of 4.17
What is one goal of the Human Microbiome Project?
Select one:
a. To sequence the DNA of all microorganisms
b. To provide comprehensive characterization of microbiota relating to human health
and disease
c. To study the prevalence of disease
d. To elucidate genetically linked diseases
e. To study microorganisms in an artificial habitat
Question 5
Correct
4.17 points out
of 4.17
The membrane attack stage of the complement cascade involves .
Select one:
a. the production of inflammatory cytokines
b. initiation of the cascade
c. the cleaving of C3 to yield C3a and C3b
d. C1q binding to surface receptors on a membrane
e. a ring-shaped protein digesting holes in bacterial cell membranes and virus
envelopes
Question 3
Correct
4.17 points out
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Some diseases can cause long-term or permanent damage in the patient termed .
Select one:
a. edema
b. sequelae
c. abscesses
d. granulomas
e. swollen lymph nodesQuestion 7
Correct
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The four classic signs and symptoms of inflammation include all of the following except
.
Select one:
a. swelling
b. redness
c. pain
d. chills
e. warmth
Question 8
Correct
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Plasma cells .
Select one:
a. are derived from T lymphocytes
b. function in cell-mediated immunity
c. produce and secrete antibodies
d. function in blood clotting
Question 6
Correct
4.17 points out
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A person will typically experience the sensation of when fever is starting to occur in
the body.
Select one:
a. pain
b. chills
c. heat
d. sweatingQuestion 10
Correct
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During which response to the antigen do we display a latent period of no secretory
antibody synthesis?
Select one:
a. Secondary
b. Tertiary
c. Primary
d. Quaternary
Question 11
Correct
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Epinephrine .
Select one:
a. reverses constriction of airways
b. causes desensitization
c. inhibits the activity of lymphocytes
d. is an antihistamine
Question 9
Correct
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The most abundant class of antibodies in serum is .
Select one:
a. IgG
b. IgD
c. IgM
d. IgE
e. IgAQuestion 13
Correct
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High levels of tryptase in the blood is indicative of .
Select one:
a. high levels of degranulating mast cells suggesting an allergic reaction
b. overuse of dietary supplements
c. a viral and/or fungal infection
d. a bacterial infection
Question 14
Correct
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of 4.17
Which event occurs with the sensitizing dose of allergen?
Select one:
a. Prostaglandins causing vasodilation and increased vascular permeability
b. Binding of allergen to adjacent IgE binding sites on mast cells and basophils
c. Histamine acting on smooth muscle
d. Degranulation
e. Binding of IgE by the Fc region to mast cells and basophils
Question 12
Correct
4.17 points out
of 4.17
John, a Peace Corps worker in the country of Mali in Africa, was in a car accident while
traveling through a rural area. He was treated at a tiny rural hospital, and due to his loss of
blood, he required a transfusion. John has B- blood type and has never received a
transfusion before. Which statement is correct regarding this scenario?
Select one:
a. He can safely receive O- blood even though he makes anti-A antibodies.
b. The preferred blood type to give John, in addition to his own B type blood, would be
AB. Both types of blood have the B antigen on the cells, so they would correspond to
his own antigens. As for Rh, he can receive only Rh- blood since he would have a
reaction against Rh+.
c. He can be given types O or B, no matter whether Rh- or Rh+. At this point in time,
he does not have anti-Rh antibody. O has no antigens on the blood cells, so he is also
safe to receive that type in addition to his own B type.
d. He can be given A+ blood type in addition to B+. Rh- means that he makes no
antibody to Rh.Question 16
Correct
4.17 points out
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An example of a secondary acquired immunodeficiency is .
Select one:
a. SCID
b. DiGeorge syndrome
c. agammaglobulinemia
d. AIDS
e. adenosine deaminase (ADA) deficiency
Question 17
Correct
4.17 points out
of 4.17
Human blood types involve all of the following except .
Select one:
a. inheritance of two of three possible alleles
b. genetically determined glycoprotein markers
c. genes that code for an enzyme that adds a terminal carbohydrate to RBC receptors
d. MHC genes
e. ABO antigen markers
Question 15
Correct
4.17 points out
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The potential for hemolytic disease of the newborn occurs when .
Select one:
a. maternal Rh - cells enter an Rh + fetus
b. fetal Rh - cells enter an Rh + mother
c. fetal Rh + cells enter an Rh - mother
d. maternal Rh + cells enter an Rh - fetus
e. fetal Rh + cells enter an Rh + motherQuestion 19
Correct
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When minute samples of DNA need to be genetically analyzed for identification purposes,
which test can be effectively used?
Select one:
a. Western Blot
b. Weil-Felix reaction
c. PCR
d. Widal
e. Direct fluorescence antibody
Question 20
Correct
4.17 points out
of 4.17
Urine and fecal specimens require .
Select one:
a. incubation in selective media
b. Both incubation in differential media and incubation in selective media are correct.
c. incubation in differential media
d. sterile collection conditions
e. Both sterile collection conditions and incubation in differential media are correct.
Question 18
Correct
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of 4.17
An effective test to determine whether an individual is allergic to a specific substance is to
.
Select one:
a. test for levels of IgE specific for the allergen
b. inject high levels of the allergen so see if the patient goes into anaphylactic shock
c. test for the allergen in the blood
d. test for high levels of IgG in the serumQuestion 22
Correct
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The ELISA test has been used as the most common, rapid screening test for HIV
infection. Its sensitivity is very high but its specificity is rather low (for an important
identification test). Which statement describes this accurately?
Select one:
a. The test can identify the patient's antibody to HIV only when it is large quantities.
b. Only certain kinds of instruments can be used to pick up the small amounts of
fluorescence given off in the ELISA.
c. A false positive test result may develop due to the test antigens capturing normal
antibodies.
d. The patient's specimen has to be handled in a certain way to maintain the integrity
of the viral DNA.
Question 23
Correct
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Dr. John Doe, a research microbiologist for a university medical center, has been accused
of sending Bacillus anthracis, the causative agent of anthrax, through the mail to the
President. You, as a public health official with the CDC, have to determine if it is the same
strain as the two strains of B. anthracis found cultured in his lab. Which method of
identification would you use to compare these three bacterial samples?
Select one:
a. Gram staining
b. Serological testing using agglutination
c. Biochemical test identification
d. Pulse-field gel electrophoresis
Question 21
Correct
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Specimen collection .
Select one:
a. does not require special handling
b. is always done by a medical professional
c. must be done under sterile conditions
d. must utilize aseptic techniquesQuestion 25
Correct
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The integument includes all of the following except .
Select one:
a. sweat glands
b. surface capillaries
c. hair
d. skin
e. nails
Question 26
Correct
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of 4.17
Which of the following is not true of bacterial conjunctivitis?
Select one:
a. Infection produces a clear discharge from the eye.
b. Treatment is with a broad-spectrum topical antibiotic.
c. It can be caused by S. pyogenes or S. pneumoniae.
d. It can be transmitted through both direct and indirect contact.
Question 24
Correct
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The environment of human skin requires an adaptation for microbes that can tolerate
moderately conditions.
Select one:
a. alkaline
b. thermophilic
c. halophilic
d. psychrophilic
e. anaerobicQuestion 28
Correct
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The smallpox vaccine uses the virus.
Select one:
a. smallpox
b. variola
c. human herpesvirus 6
d. herpessimplex
e. vaccinia
Question 29
Correct
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Impetigo can be caused by either Staphylococcus aureus or Streptococcus pyogenes.
Culture-based identification of the causative organism can be complicated by .
Select one:
a. their common optimal growth temperature, 37°C
b. the ability of S. aureus to kill S. pyogenes
c. the fastidious nature of both organisms
d. the common surface antigens of these two organisms
Question 27
Correct
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Eyes are relatively vulnerable to infection because .
Select one:
a. there is a restricted response by B and T cells
b. All of these choices are correct.
c. they are not covered by keratinized epithelium
d. immune privilege restricts access to the cells conferring innate immunityQuiz navigation
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Question 30
Correct
4.17 points out
of 4.17
Which of the following statements regarding viremia is incorrect?
Select one:
a. Droplet transmission of viruses like the measles virus results in viremia.
b. Shingles is a manifestation of persistent viremia after a course of chicken pox.
c. The variola virus multiplies in white blood cells, andcell lysis results in viremia.
d. HHV-3is disseminated to the skin by viremia. [Show Less]