Which of the following genes may attribute to the virulence of H. pylori by encoding for outer membrane proteins that mediate adherence to a specific blood group antigen on the surface of gastric epithelial cells?
a. babA
b. iceA
c. cagA
d. vacA
A
babA encodes outer membrane proteins and mediates adherence to blood group antigens on the surface of gastric epithelial cells. The presence of iceA is associated with peptic ulcer disease in some populations; cagA encodes a type IV secretion system for transferring cagA proteins into host cells; and vacA creates vacuoles in epithelial cells, decreases apoptosis, and loosens cell junctions.
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Which of the following is NOT a process of aerobic respiration?
A. citric acid cycle B. glycolysis C. acetyl CoA formation D. oxidative phosphorylation E. lactate fermentation
In electron micrographs, the appearance of the T tubule with the terminal cisternae on either side appears as three circles called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
According to the American Cancer Society, 30% of all cancer deaths in the U.S. are due to ____
a. ultraviolet light exposure b. automobile exhaust c. industrial pollutants d. pesticide and herbicide exposure e. smoking
The pressure exerted on the inner walls of the arteries when the heart relaxes between beats is the ____ pressure
a. systolic b. diastolic c. barometric d. residual