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Question
Which of the following forms of oxygen is/are generally toxic to living organisms?A) superoxide anion
B) hydrogen peroxide
C) hydroxyl radical
D) superoxide, hydrogen peroxide, and hydroxyl radicals are all toxic
Answer
This answer is hidden. It contains 1 characters.
Related questions
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A) gonorrhea.
B) influenza.
C) hepatitis.
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A) Staphylococcus aureus
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Which of the following statements about chlamydial infections is TRUE?
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The Spanish flu of 1918 was caused by an ________ influenza virus.
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D) H2N2
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Diseases can be controlled through immunization even if the percentage of the population that is immunized is less than 100% because
A) vectors can be controlled through other means.
B) most diseases lack reservoirs.
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In 2003, the majority of AIDS deaths occurred in
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C) Europe.
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The study of the occurrence, distribution, and determinants of health and disease in a population is the field of
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Filoviruses (such as Ebola virus) that cause severe hemorrhagic fevers generally have high ________ but low ________.
A) incidence / prevalence
B) prevalence / mortality
C) mortality / morbidity
D) morbidity / mortality
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Cholera is an example of a pandemic disease that
A) has multiple wild animal reservoirs and is thus difficult to eradicate.
B) spreads from a common source and could be controlled with adequate clean water and waste sanitation measures.
C) is spread through direct contact and has only a human reservoir.
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Influenza pandemics occur cyclically because
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B) new strains emerge due to reassortment between bird, swine, and human variants.
C) the vector is seasonal.
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B) can be virtually any pathogenic bacterium or virus.
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Which of the following is involved in B cell selection and tolerance?
A) clonal anergy
B) clonal deletion
C) clonal anergy and deletion
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B) high energy.
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Q:
An individual usually expresses ________ structurally distinct allele(s) that encode class I MHC proteins.
A) one
B) two
C) four
D) six