The bone marrow must continuously generate new red blood cells because the life span of a typical red blood cell is only ________
The life span is even shorter in individuals with sickle-cell trait, which accounts for the protective effects against malaria. Fill in the blank(s) with correct word
100-120 days
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Which of the following is not a characteristic of normal cells?
A. They grow as a monolayer. B. They grow as multiple layers. C. They undergo a limited number of divisions and then die. D. They stick tightly to the surface of glass culture dishes.
Although they have a diversity of structures, all members of this group of organic molecules are
primarily nonpolar and thus water-insoluble.
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids
The original published articles describing the structure of DNA were authored by _____ and _____
a. Crick; Franklin b. Watson and Crick; Franklin c. Wilkins; Franklin d. Wilkins; Watson and Crick e. Watson; Crick
Drugs delivered in aerosols that dilate bronchioles are used to treat ____________________. Fill in the blank(s) with the appropriate word(s)