One surprising finding in the Human Genome Project was that what percentage of the genome encodes a functional product?
A. 98%
B. 50%
C. 2%
D. It varies based on the individual.
Answer: C. 2%
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Hemophilia is caused by a
A. recessive allele on the X chromosome. B. dominant allele on the X chromosome. C. codominant allele on the X chromosome. D. recessive allele on an autosome. E. dominant allele on an autosome.
A patient who is positive for the human immunodeficiency virus (HIV) is diagnosed with a Cryptococcus neoformans infection. The attending resident prescribed Griseofulvin; however, the patient's condition did not seem to improve. Which one of the following statements explains this discrepancy?
a. The dose should be increased to penetrate the blood-brain barrier. b. Nystatin, which would have been more effective, should have been prescribed. c. Griseofulvin is not effective against C. neoformans; therefore the therapy should be changed. d. Potassium iodide is the therapy of choice, not griseofulvin.
A viral species is found to infect host fishes in isolated mountain lakes. The host range is
A. the one or more infected species of fishes that exhibit the viral disease symptoms. B. All of the answer choices are correct. C. the specific sizes and shapes of the fish tissue cells that become infected by the viruses. D. the mountainous area, in which the isolated lakes are found and mapped. E. impossible to determine, because the isolated lakes don't allow tests for the infection of other fishes.
What physical properties of phospholipids make them useful in building membranes?
a. their usefulness in cells in living organisms that exist in watery environments, dueto their polarity b. their ability to interact with polar and non-polar compounds c. their ability to form a bilayer because of their polar and non-polar components d. all of the above