The actual transport of protons by the proton pump is mediated by a transmembrane protein that undergoes a change in its
A. immunity.
B. net charge.
C. amino acid sequence.
D. solubility.
E. conformation.
Answer: E
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In step 6 of the citric acid cycle, succinate + FAD fumarate + FADH2. Which statement concerning this reaction is true?
A. Fumarate is more oxidized than succinate. B. FAD is more reduced than FADH2. C. FAD is an oxidizing agent in the reaction. D. This is not an oxidation/reduction reaction, that is, no electrons have moved. E. a and c are both correct.
What is the function of microvilli?
a. Microvilli provide structure inside the cell to maintain its shape and support organelles. b. Microvilli allow cells to remain attached to neighboring cells in hostile environments. c. Microvilli provide cells with a larger surface area for absorbing nutrients from food. d. Microvilli provide a means of rudimentary locomotion for cells that distribute nutrients.
If you get a Simpson's index of 1, this means
A) there is only one species in the community. B) all species are in equal proportions. C) the calculation is incorrect as this is theoretically impossible. D) the Shannon index will equal 0.
Monotremes
A. include the anteater and duck-billed platypus. B. are egg laying mammals. C. nurse their young. D. All of the answer choices are correct.