The proteins of the electron transport chain are:
A. embedded in the inner mitochondrial
membrane.
B. embedded in the outer mitochondrial
membrane.
C. embedded in both mitochondrial
membranes.
D. located in the intermembrane space of
mitochondria.
E. located in the mitochondrial matrix.
A
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A 2009 study of more than 4,300 people identified a(n) ____ as the most likely reason why the least-fit among the group had higher mortality rates than the moderately fit and most-fit.
a. lack of opportunities b. addiction to drugs c. addiction to alcohol d. sedentary lifestyle e. unhealthy environment
A population descending from a single organism or pure culture isolate is called a ________.
A. strain B. genus C. subspecies D. species
Which of the following groups of animals is found in the same environment, and has similar heat storage adaptations, as cheetahs?
A. Gazelles B. Rhinos C. Giraffes D. Elephants E. Hyenas
If orange juice has a pH of 4 then
A. the H+ concentration is 4. B. it is an acidic solution. C. it is an alkaline solution. D. it is an acidic solution with a H+ concentration of 4. E. None of these choices are correct.