During an allergic reaction, IgE antibodies bind to ____
a. B cells
b. T cells
c. plasma cells
d. mast cells
e. neutrophils
ANSWER: d
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Activated complement brings about the death of a microbe when it ________
a. mediates interactions between immune cells only b. activates a chemotaxic response in certain phagocytic cells only c. all of the choices d. organizes into a membrane pore and causes lysis of the cell only
If an mRNA carries CUCGAU as a sequence,
what would be the complementary sequence on the DNA?
a. CTCGAT b. GUGCUA c. GTGCAT d. GAGCTA e. ACATGC
What makes water a good solvent?
a. It dissolves ions and polar molecules. b. It dissolves fats. c. It mixes well with alcohol. d. It heats up very quickly. e. It is very acidic.
A major function of keratin is to:
a. absorb UV radiation. b. insulate the body. c. nourish sensory receptors. d. synthesize fats and waxes. e. create a diffusion barrier.