Superantigens are potent stimulators of what cell type?
A. Monocytes
B. Dendritic cells
C. B cells
D. T cells
D. T cells
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Which of the following is one of the big differences between eukaryotic and prokaryotic DNA replication?
a. Helicase is not used by eukaryotes. b. There is no topoisomerase found in eukaryotic cells. c. In eukaryotic DNA replication, histones must be removed. d. Only eukaryotes have Okazaki fragments to be ligated.
Which of the following types of cells would a flu virus most likely target as the means of entry into the body?
A. epithelial cells lining the respiratory system B. epithelial cells on the skin's surface C. red blood cells that are exposed through breaks in the skin D. osteoclasts within bone cells
Conspicuous shelf-like or saddle-like structures on the surface of a tree that indicate a fungus is growing within the tree are for:
A) showy display to attract a mate. B) defense from predators. C) pollination. D) reproduction and spore dispersal.
Which of the following enzymes is found ONLY in hyperthermophiles?
a. topoisomerase I b. reverse DNA gyrase c. helicase d. DNA polymerase III