Mutations affecting all of the following except _____ interfere directly with the rearrangement of immunoglobulin and T-cell receptor genes
a. Artemis
b. purine nucleoside phosphorylase (PNP)
c. DNA-dependent protein kinase (DNA-PK)
d. RAG-1
e. RAG-2.
B
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Although evidence has suggested that children from single-parent families are less successful in school, this could actually be attributed to _______________ and not the absence of the second parent.
A. gang affiliation B. lack of an extended family C. alcohol and drug abuse D. low educational attainment of the single parent
Which is not a type of leukocyte?
a. basophil b. eosinophil c. thrombin d. lymphocyte
At the site of tissue injury, basophils release ________
A) fibrin B) stem cells C) interleukin D) histamine
Cell growth is controlled by ____, found in the nucleus of each cell
a. mitochondria b. DNA and RNA c. benign tumors d. specialized enzymes e. capillaries