What factor do the diseases PKU, albinism, and alkaptonuria all have in common?
What will be an ideal response?
They are all marked by a block in the phenylalanine-tyrosine metabolic pathways.
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Which of the following is the most effective treatment for acquired immune deficiency syndrome (AIDS)?
A. vaccine to coat proteins B. reverse transcriptase inhibitors such as AZT C. protease inhibitors D. a combination of drugs directed at both reverse transcriptase and the HIV protease E. There is no effective treatment because the virus is always integrated into the host DNA.
Myasthenia gravis is an example of an autoimmune disease that involves
A. sensitized T cells. B. cytotoxic T cells. C. antibodies. D. IgD.
The final electron acceptor in the electron transport chain system is _______
Fill in the blank(s) with the appropriate word(s).
The function of lymph nodes is to filter pathogens, microorganisms, and abnormal cells from the lymph before it returns to the cardiovascular system.
a. true b. false