Uropathogenic E. coli can use all the following virulence factors to establish infection in the urinary tract except
A) proteases and toxins.
B) antigen mimicry.
C) pili and adhesions.
D) siderophores.
E) invade bladder cells to become intracellular.
Answer: B
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____ allow oxygen to diffuse through the outer bark of woody plants to supply the respiratory needs of the underlying cells
Fill in the blank with the appropriate word.
All matter is made up of atoms
Indicate whether the statement is true or false
One characteristic shared by sucrose, lactose, and maltose is that _____.
A. they are all polysaccharides B. they are all monosaccharides C. they are all disaccharides D. they all contain fructose E. they are all indigestible by humans
The breathing center in the brain is most sensitive to the
a. concentration of oxygen b. concentration of carbon dixoide in the lungs c. concentration of carbon dioxide in the blood d. amount of oxygen in the cells