One of the main problems associated with treating human diseases through gene therapy is
A) finding human cells that could potentially be genetically engineered.
B) the inability to clone human cells.
C) finding a delivery system that would target specific cell types.
D) finding the correct form of the gene to be delivered.
E) determining a disorder that could be cured through gene therapy.
C
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A small, heat-stable DNA-binding protein present in the cells of some Archaea, called Sac7d, binds to the minor groove of DNA in a very specific manner and increases its melting temperature by 40 °C
Indicate whether the statement is true or false.
Effector helper T cells release cytokines only
when which of the following occur?
a. The effector helper T cell binds to an antigen-presenting dendritic cell. b. The effector helper T cell binds to a memory T cell. c. The effector helper T cell binds to a complement protein. d. The effector helper T cell binds to MHCantigen complexes on B cells. e. Any of these can stimulate cytokine production.
__________ are an ancient fungal group and the only fungi with flagellated spores and gametes. Fill in the blank(s) with the appropriate word(s)
Autoimmune disorders are characterized by immune destruction of self tissues. The underlying basis of these disorders is
A. an overproduction of complement. B. lack of an anamnestic response. C. an oversecretion of antibodies from memory B cells. D. a lack of immune tolerance.