When Ron Evans generated transgenic mice in which the gene PPAR-delta was constitutively 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 anatomical change would be that the transgenic mice
A. were more likely to become obese than wild-type (nontransgenic) mice.
B. showed less endurance in a running test.
C. showed greater endurance in a running test.
D. had leg muscles with lower mitochondrial and capillary densities than wild-type (nontransgenic) mice.
E. had muscles that were not as red as those of wild-type (nontransgenic) mice.
C. showed greater endurance in a running test.
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Populations of bay checkerspot butterflies that occupy large patches of suitable habitat serve as sink populations for
individuals that recolonize small patches of suitable habitat where butterfly populations frequently become extinct.
Indicate whether the statement is true or false.This diagram illustrates the action of a proteasome on protein marked with ubiquitin tags. What statement about this process is true?
a. Degradation of proteins results in the destruction of the proteasome.
b. Degradation of proteins in proteasomes produces a net output of energy.
c. Degradation of proteins in proteasomes requires a net input of energy.
d. Proteasomes absorb all non-amino acid components of proteins.
Which feature(s) DID NOT contribute to the ability of humans to maintain an upright body position?
a. curvature of the spine b. size and position of the pelvis c. position of the foramen magnum d. alignment of the toes e. smaller canines
Which of these molecules would provide the most energy (kcal/g) eaten?
a. glucose b. starch c. glycogen d. fat e. protein