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Staphylococcal species like S.aureus are normally harbored on the skin. When introduced into an abrasion these organisms cause infection. All of the following terms can be applied to such staphylococcai.except

A. Endogenous pathogens
B. Opportunists
C. Commendable
D. True pathogens
E. Indigenous

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Bunny Greenfelder
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6 Jun 2019

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Related questions

1. Which of the following is true of mutations?
A. They always cause a change to an organisms phenotype.
B. They always cause a change to an organisms genotype
C. They are always fixed by DNA repair enzymes
D. They are always harmful for the organism

2. Which of the following is currently an important medical application of recombinant DNA technology?
A. DNA hybridization analysis to determine the presence of a microbial pathogen
B. Ribotyping of bacterial pathogens if interest to the medical field
C. Production of medically useful proteins in microbes
D. Production of humans with altered genotypes that render them resistant to pathogens

3. Why are bacterial plaids problematic for human health?
A. They are circular
B. They can be manuipulated in labs
C. They can transfer across species
D. They can integrate into the human nuclear genome

35. What is the relationship between osmolarity and water activity?

(A) There is a negative correlation; as osmolarity increases water activity also increases.

(B) There is a positive correlation; as osmolarity increases water activity decreases.

(C)There is no correlation between osmolarity and water activity.

(D)There is a negative correlation; as osmolarity increases water activity decreases.

(E) There is a positive correlation; as osmolarity increases water activity also increases.

36. Which of the following enzymes generates hydrogen peroxide when destroying a reactive oxygen species?

(A) superoxide dismutase (B) catalase

(C)peroxidase (D)ATP synthetase

(E) NADH dehydrogenase

37. A genetic program leading to the production of chaperones, proteases, and enzymes that change membrane lipid composition, in response to adverse environmental conditions, is known as the

(A) irradiation response. (B) high pressure response.

(C)halophilic response. (D)Arrhenius response.

(E) heat shock response.

38. Changes in environmental temperature may

(A) affect the fluidity of bacterial membranes.

(B) affect the motion of macromolecules within the bacterial cell.

(C)affect the stability of molecules within bacteria.

(D)all of the above.

(E) none of the above.

39. Within temperatures allowable for growth, higher temperatures usually lead to

(A) higher growth rates. (B) slower growth rates.

(C)no effect on growth rates. (D)unpredictable growth rates.

(E) variable effect, depending on the species.

40. Which of the following sentences is correct?

(A) Sanitation kills all cells, spores, and viruses on an object, sterilization removes pathogens from inanimate surfaces, and disinfection removes pathogens from the surface of living tissues.

(B) Disinfection kills all cells, spores, and viruses on an object, antisepsis removes pathogens from inanimate surfaces, and sterilization removes pathogens from the surface of living tissues.

(C)Sterilization kills all cells, spores, and viruses on an object, disinfection removes pathogens from inanimate surfaces, and antisepsis removes pathogens from the surface of living tissues.

(D)Disinfection kills all cells, spores, and viruses on an object, sterilization removes pathogens from inanimate surfaces, and antisepsis removes pathogens from the surface of living tissues.

(E) Sanitation kills all cells, spores, and viruses on an object, sterilization removes pathogens from inanimate surfaces, and antisepsis removes pathogens from the surface of living tissues.

19. Which of the following is true of all biofilms?

(A) They only contain a single species of bacteria.

(B) Biofilms can form on a range of biotic or abiotic surfaces.

(C)Cells in a biofilm are dormant until the bacteria leave the biofilm.

(D)Biofilms are composed of a single monolayer of EPS.

(E) Biofilms are not found in or on the human body.

When someone gets a bone marrow transplant, they have to be quarantined and carefully protected from pathogens for a period of time afterward. Why?

A.

Bone marrow produces the main cells involved in the specific immune response, so these patients are at special risk of infection until they build up enough marrow to produce sufficient cells.
B.

Bone marrow produces blood cells, so they have insufficient circulation for a period of time so their immune system lacks the energy to fight off any infection.
C.

Anytime a foreign substance, even someone else's bone marrow, is introduced to a body, there is an extra risk of infection.
D.

A common complication of bone marrow transplants is infection, and doctor's don't want the infection to spread to others.
E.

It's a traumatic procedure, and any extra stress on their body could kill them.

There is antibody-mediated and cell-mediated specific immunity. Which type of cells are primarily involved in the antibody-mediated immune response?

A.

Macrophages
B.

B cells
C.

Complement proteins
D.

T cells
E.

Antigens

From the bacteria's perspective, why is it helpful that it produce diarrhea in people?

A.

Because it gets the bacteria out of the person and, likely, into the next one
B.

It's not helpful really. That's just what that toxin causes.
C.

Because that quickly kills the person
D.

Because it makes the patient too unpleasant to be around
E.

Because there is no real treatment for that

Where do prions come from?

A.

There are prion-like particles in the brain normally, and when these become abnormal they can cause disease.
B.

Mosquitoes.
C.

They are clumps which form from normal prion-like particles in the blood that travel to the brain.
D.

They are introduced by infectious protozoa.
E.

Contaminated water.

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