You inject a dye into an animal cell and observe that it moves into adjacent cells. This would occur through
A. adherens junctions.
B. gap junctions.
C. desmosomes.
D. tight junctions.
E. plasmodesmata.
Answer: B
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The net gain of ATP per molecule of glucose metabolized anaerobically via the Embden-Meyerhof pathway in prokaryotes is
A. 85. B. 38. C. 36. D. 2.
Select the membrane molecule that is made up of a polar region with two nonpolar fatty acid tails.
A. transmembrane proteins B. cell surface proteins C. carbohydrate chains D. phospholipids
A sexual system where a male gorilla mates with several females, forming pair bonds with each of them, is called
A) promiscuity. B) monogamy. C) polyandry. D) polygyny.
Photoheterotrophs are best described as organisms that obtain energy to make ATP
A) from organic compounds but use sunlight to produce carbon sources. B) and organic compounds from sunlight. C) from sunlight but cannot make organic compounds from CO2. D) from NADH. E) from organic compounds.