While doing a pedigree analysis of a royal family from a Pacific Island nation, you notice two parents with the same genetic disease who have four children
All four of the girls have the
disease, but when they marry unaffected individuals none of the 16 grandchildren has the
disease. If this disease is controlled by a single gene, then the most likely explanation would
be:
A. the disease is a spontaneous mutation.
B. the disease is recessive and is only seen
in homozygous recessive individuals such as
the affected girls.
C. the disease is dominant and is only seen
in homozygous dominant individuals.
D. the disease is dominant and is seen in
heterozygous or homozygous dominant
individuals.
B
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When a person drinks alcohol, the rate of urination increases. This suggests that antidiuretic hormone (ADH) may be affected by alcohol consumption in some way. Which of the following best accounts for the increase in urination?
A) Alcohol stimulates the release of ADH. B) Alcohol inhibits the release of ADH. C) Alcohol inhibits the binding of ADH to receptors in the nephron. D) Alcohol could inhibit ADH release or the binding of ADH to receptors in the nephron.
You wish to determine the cellular location of a protein but unfortunately it is not particularly antigenic (i.e., it can't develop a strong antibody response). How could you solve this problem?
A. Create a fusion protein with an epitope tag that can be visualized by incubation with fluorescently tagged antibody to the epitope. B. Create a fusion protein with an epitope tag that is fluorescent without the addition of antibodies. C. Create a fusion with green fluorescent protein (GFP). The fusion protein will fluoresce when streptavidin is added. D. Express the protein as a fusion with biotin. The addition of GFP will cause fluorescence. E. None of these methods will work.
Myotonic muscular dystrophy ____
a. occurs from overuse b. is usually seen in adults c. is the most common form of myopathy in children d. is life-threatening e. usually affects muscles of the chest and back
Which of the following shapes are most common among prokaryotes?
a. rodlike, cylindrical, and spherical b. rodlike, spiral, and spherical c. rodlike, circular, and spherical d. rodlike, spiral, and cylindrical