Why should pregnant women and small children avoid certain fish?

A. PCB contamination
B. lead contamination
C. mercury contamination
D. pesticide contamination
E. herbicide contamination


Answer: C

Biology & Microbiology

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Cells are largely constructed from four classes of large molecules called ____________________

Fill in the blank(s) with correct word

Biology & Microbiology

Nearly every eukaryotic cell

A) has its genetic material concentrated in a membrane-enclosed nucleus. B) has a cell wall composed of cellulose that serves as the outer boundary of the cell. C) contains a hard, noncompressible fluid called the cytosol. D) possesses flagella and cilia, unlike prokaryotes. E) contains all of its genetic material in mitochondria.

Biology & Microbiology

When __________ is uncovered and myosin can bind to it, contraction of a muscle can occur when ATP is utilized. 

A. actin B. myosin C. tropomyosin D. troponin

Biology & Microbiology

The interferon-gamma release assay for tuberculosis infection works because

A) individuals who have had the TB vaccine can be identified by the amount of interferon-gamma in their blood. B) the presence of interferon-gamma indicates a person is susceptible to TB infection. C) the T cells of an infected person release more interferon-gamma than that of a non-infected person. D) one can perform an indirect ELISA to detect antibodies to interferon-gamma in a patient with TB. E) the TB bacterium releases interferon-gamma.

Biology & Microbiology