In the accompanying figure illustrating the levels of life’s organization, what is represented in frame 2?
a. atom
b. tissue
c. molecule
d. organ
e. cell
ANSWER: c
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Acute viral gastroenteritis is the leading cause of death in
A. children in the United.States. B. children in developing countries. C. children in day care centers. D. children worldwide.
An agent that kills bacteria is referred to as ________.
Fill in the blank(s) with the appropriate word(s).
To which amino acid is nitric oxide added, altering the activity, turnover and/or interactions of proteins like hemoglobin, Ras, ryanodine channels and caspases?
a) methionine b) cysteine c) asparagine d) phenylalanine e) alanine
Which of the following is NOT a function of cellular membranes?
A. selective uptake and export of ions and molecules B. cell compartmentalization C. cell signaling D. maintenance of cell shape E. cell adhesion