Which of the following statements about atherosclerosis is false?
a. Both high-fat diets and genetics influence the development of the disease
b. A heart attack occurs when a cardiac artery is completely blocked.
c. High HDL levels in blood increase risk of atherosclerosis.
d. Buildup of lipids in the arterial wall narrows the lumen.
c
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Opportunistic pathogens such as Legionella, Pseudomonas, and Mycobacterium species have the ability to grow within ________, which may enhance their ability to survive in water distribution systems
A) human saliva B) fish C) protists D) UV irradiated water
What happens in the third step of the type I topoisomerase reaction?
A. The enzyme changes to the open conformation. B. The unbroken DNA strand passes through the break in the first strand. C. Active-site tyrosine acts as a nucleophile and attacks one strand to form an enzyme-linked intermediate. D. The enzyme changes to the closed form. E. The 3' OH of the broken strand attacks the link between the active site tyrosine and the 5' end of the broken strand, resulting in religation of the broken strand.
RNA is characterized by which one of the following features?
A. Deoxyribose B. Thymine C. Ribose D. Double-stranded
As a result of calcium pumps, calcium concentrations are typically higher outside cells than in the cytosol
Indicate whether the statement is true or false.