Which of the following is not a feature of yeast artificial chromosomes (YACs) and YAC vectors?
A. CEN sequences for stability and proper segregation
B. selectable markers in each arm to ensure their presence in the final construct
C. yeast origin of replication
D. a circular form in the yeast cell
E. TEL sequences for stability and proper segregation
D
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The organization of the vasa recta around the loop of Henle:
A. allows urea to be concentrated in the distal convoluted tubule. B. allows water to be maximally reabsorbed from the distal convoluted tubule. C. allows the concentration gradient established by the loop of Henle to be maintained. D. allows urea to be concentrated in the distal convoluted tubule and allows the concentration gradient established by the loop of Henle to be maintained. E. allows water to be maximally reabsorbed from the distal convoluted tubule and allows the concentration gradient established by the loop of Henle to be maintained.
The key concept in neo-Fordist production systems is
A) flexibility. B) externality. C) localization. D) disintegration. E) elasticity.
Most solutes pass through the cytoplasmic membrane via
A. osmosis. B. diffusion. C. transport proteins. D. secretion.
The coastal zone is best described as the:
A) main profundal zone of the ocean. B) zone where freshwater and saltwater mix. C) area between high and low tide. D) area between low tide and the start of the benthic zone. E) area between high tide and the edge of the continental shelf.