Serologic tests may be used to detect ________ for diagnosis of disease
A) the concentration of serum proteins
B) the ability of the patient's antibodies to activate the complement system
C) antigen-specific antibodies
D) specific epitopes
E) the proportion of plasma in a patient's blood
C
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How could the Hershey and Chase experimental procedure be re-designed to support the hypothesis that RNA rather than DNA was the transforming agent?
A. Extract RNA from Escherichia and mix it with the T2 bacteriophage. B. Use 35S and 32P to label the same components of an RNA virus and T2 bacteriophage, then add both viruses to Escherichia cells. C. Use 35S to label an RNA virus and 32P to label a DNA virus. D. Replace Escherichia with an RNA virus. E. Replace T2 bacteriophage with an RNA virus.
One of the actions of the birth control pill is to
a. prevent FSH and LH from being released from the hypothalamus. b. prevent ovulation. c. stop development of the uterine lining. d. increase plasma testosterone levels. e. synchronize the body’s biological clock.
Cushing’s syndrome can cause _____
a. low blood pressure b. impaired immunity c. osteoporosis d. liver failure e. weight loss
The population growth in less-developed countries is
A. modestly increasing. B. stable. C. dramatically increasing. D. leveling off. E. negative.