Steroids are considered to be lipids because they _____
A) are essential components of cell membranes
B) are not soluble in water
C) are made of fatty acids
D) contribute to atherosclerosis
B
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The ____ keeps the lungs from completely deflating, even after a maximal exhalation
a. residual volume b. tidal volume c. vital capacity d. lung capacity e. lung volume
Which statement is true?
a. High concentrations of ATP inhibit the formation of more ATP. b. The ATP concentration in cells actually decreases at first when cells need large supplies of energy. c. The activity of many different enzymes influences the supply of ATP in cells. d. Cells constantly adjust their metabolic reactions to provide energy whenever it is needed. e. All of these are true.
The bones in the forelimbs of a mammal
a. can often be traced to a common ancestor. b. offer no evidence to support the theory of evolution. c. perform the same function no matter which species they are in. d. may exhibit either analogy or homology but not both when compared to the forelimb of another animal. e. show convergence with some invertebrate structures.
The digestion of __________ begins in the mouth
a. carbohydrates b. proteins c. lipids d. nucleic acids e. none of these