Natural killer cells resemble ________ and develop from the same type of stem cell.
A. eosinophils
B. neutrophils
C. lymphocytes
D. basophils
Answer: C
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In HIV infection, reverse transcriptase
A. makes RNA from viral DNA. B. makes protein from viral DNA. C. makes protein from viral RNA. D. makes DNA from viral RNA.
In the distal convoluted tubule, a _____ is secreted for every sodium ion that is reabsorbed.
A. chloride ion B. bicarbonate ion C. potassium ion D. calcium ion
Which vessel supplies blood to the brain?
A) Radial artery B) Coronary artery C) Internal carotid artery D) Subclavian artery
The major histocompatibility complex
a. was first observed in virally infected fish. b. is a group of cells responsible for presenting antigens to B-cells to stimulate antibody production. c. is a cluster of genes which encode self-antigens. d. is the membrane glycoprotein and associated antigen presented to B-cells. e. none of these.