Which immunoglobulin is found in saliva, mucus, and mother's milk?
A. IgG
B. IgM
C. IgE
D. IgA
E. IgD
Answer: D
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In clinical isolates, the most likely identification of coagulase-positive, catalase-positive, gram-positive cocci that are penicillin resistant would be:
a. S. aureus. b. S. intermedius. c. Stomatococcus luteus. d. Micrococcus aureus.
Which of the following statements about autosomal dominant inheritance is false? a. Achondroplasia is an example of an autosomal dominant trait
b. In a testcross, a heterozygote will produce affected offspring 50% of the time. c. Lethal dominant alleles arise through mutation but are gradually weeded out of the population. d. Both homozygous dominant and heterozygous individuals express an autosomal dominant trait.
If the gp120 glycoprotein were damaged as a result of a mutation, HIV would have difficulty:
A. attaching its RNA to a host cell's ribosome. B. leaving a macrophage. C. assembling the capsid. D. inserting its genes into the host cell's genome. E. binding to a host cell.
One can inject dyes of different sizes into a liver cell and determine those molecules that can readily pass through gap junctions. What sized molecules can pass through gap junctions?
A. >1,000 Daltons, but <1,500 Daltons B. >5,000 Daltons, but <10,000 Daltons C. >10,000 Daltons D. <1,000 Daltons E. >1,500 Daltons, but <5,000 Daltons