Which feature is found in all cells?
a. nucleus containing DNA
b. plasma membrane composed of phospholipids
c. flagella
d. cell wall composed of cellulose
e. nucleoid region that contains DNA
Answer: b. plasma membrane composed of phospholipids
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When Ron Evans generated transgenic mice in which the gene PPAR-delta was constituitively active (i.e., always expressed), he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. One consequence of this change was that the transgenic mice
A. showed greater endurance in a running test. B. showed less endurance in a running test. C. had leg muscles with lower mitochondrial and capillary densities than wild-type (nontransgenic) mice. D. were more likely to become obese than wild-type (nontransgenic) mice. E. had muscles that were not as red as those of wild-type (nontransgenic) mice.
Plants require a lot of water for hydration, metabolism, homeostasis, and photosynthesis. How is water used in photosynthesis?
A. as an electron donor in the photosystems B. to combine with NADP+ to form NADPH C. to combine with ADP to form ATP D. as an electron acceptor in the electron transport chain E. as a substrate for ATP synthase
Carbon is introduced into the atmosphere by all
EXCEPT which of the following means? a. respiration b. volcanic eruptions c. burning of fossil fuels d. wind erosion of rocks e. combustion of wood
List three properties that all forms of cancers share and summarize the origin of these properties. What will be an ideal response?