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Which of the following infectious agents and means of disposal are mismatched?
Select one:
a. Coagulation factors purified from blood must be heat-treated to destroy HIV.
b. Carcasses of animals that died of anthrax must be incinerated to avoid endospores entering the soil.
c. Mosquito bed nets must be washed in bleach weekly to eliminate any residual Plasmodium.
d. Drums made with animal hides should be treated with sterilizing gas to eliminate endospores.
Mosquito bed nets must be washed in bleach weekly to eliminate any residual Plasmodium.
The causative agent in a case of sepsis can be isolated by
Select one:
a. inoculating blood agar with a sample of the patient's blood.
b. performing a Kirby-Bauer assay on a sample of the patient's blood.
c. sending a blood sample to the CDC laboratories in Atlanta.
d. centrifugation of the blood to separate cells and plasma.
inoculating blood agar with a sample of the patient's blood.
1.Which class of eukaryotic microorganisms can be subdivided into groups such as Mastigophora,Â
Sarcodina, Ciliophora, and Apicomplexa?
A. Helminths
B. Algae
C. Protozoa
D. Fungi
Protozoa
2. Genetic material can be excised from one chromosome and directly integrated into another via
A. conjugation.
B. transformation.
C. transduction.
D. transposons.
transposons.
3. Which immune cell secretes numerous cytokines that help to coordinate the response of otherÂ
immune cells?
A. B cell
B. TH cell
C. TC cell
D. Platelets
TH cell
4. Which of the following enzymes are used to amplify DNA during PCR?
A. restriction endonuclease
B. DNA polymerase
C. reverse transcriptase
D. DNA ligase
DNA polymerase
5. In the nitrogen cycle, which of the following steps involves removal of nitrogen from the atmosphereÂ
by bacteria?
nitrogen fixation, In nitrogen fixation, nitrogen is removed from the atmosphere by nitrogen-fixingÂ
bacteria and converted to ammonia.
6. If enough h+ ions are added to pure water to raise the H+ concentration of the solution to ten timesÂ
higher than the original concentration, what is the resulting OH- concentration of the solution?
10 -8M
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