Which component of fat can be metabolized for the production of ATP?
A) amino acids
B) monosaccharides
C) nucleic acids
D) glycerol
D
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You recently identified a molecule that you believe is a primary messenger for a signal transduction mechanism. All you know about this ligand is that it is hydrophilic. Where would you expect to find initial interaction of the molecule with its receptor?
A) on the outer surface of the plasma membrane B) within the cytoplasm of the cell C) within the nucleus of the cell D) on the cytoplasmic side of the plasma membrane E) in endosome vesicles
The energy source of photosynthesis is
A. oxygen. B. sunlight. C. carbon dioxide D. chlorophyll. E. glucose
Comparing the evolution of domesticated dogs to the evolution of wolves over the same time period illustrates what relationship between artificial and natural selection?
A. Artificial selection is more likely to produce maladaptive structures than natural selection. B. Artificial selection cannot produce changes as large as changes produced by natural selection. C. Artificial selection is reversible; natural selection is not. D. In artificial selection, the magnitude of the selection pressure can be varied; in natural selection, it cannot. E. Artificial selection is slower than natural selection.
The Most Probable Number (MPN) method is used
A) to estimate numbers of cells in samples with a high density of bacterial cells. B) when samples contain obligate anaerobes. C) to estimate numbers of cells in samples with a low density of bacterial cells. D) to isolate autotrophic bacteria. E) to determine the generation time of bacterial isolates.