Which category of antineoplastic drug consists of analogs of bases occurring in DNA and incorporates into the DNA molecule?
a. antitumor antibiotics
b. antimetabolites
c. alkaloids
d. steroid drugs
.B
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To initiate a smooth muscle cell contraction, calcium enters the cell and binds to
A. troponin, which then activates myosin light-chain kinase. B. calmodulin, which then binds to and activates myosin light-chain kinase. C. myosin light-chain kinase, which then hydrolyzes ATP. D. a phosphatase, which then removes the tropomyosin blockade. E. a myosin head, which then activates calmodulin.
The portion of the pericardium that covers the heart wall is called the ________
A) visceral layer (epicardium) B) fibrous pericardium C) parietal layer of the serous pericardium
Glucose is not considered an essential nutrient because it is not essential for good health
Indicate whether the statement is true or false.
Niacin is a B-complex vitamin.
Answer the following statement true (T) or false (F)