A Treg cell deficiency could result in
A) increased number of viral infections.
B) increased number of bacterial infections.
C) autoimmunity.
D) increased severity of bacterial infections.
E) transplant rejection.
C
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In transduction, bacteria acquire new genetic information in the form of:
A) bacterial genes. B) naked DNA. C) R-factors. D) viral genes.
Where is the amino-acid binding site located on the tRNA molecule?
a. in the middle of the loop b. at the end of the 3? end of the molecule c. in the first loop d. along the longest stretch of base pairing in the molecule e. on the 5? end of the molecule
When a B or T cell is primed by an interaction with its particular antigen, the cell ________
A) dies, killing the antigen B) engulfs the antigen and destroys it C) grows, divides, and develops further D) sticks to other cells with attached antigens to form a large clot
In many bacteria, genes that confer resistance to antibiotics are carried on
A) F factors. B) R plasmids. C) introns. D) exons.