When comparing gene regulation in prokaryotes and eukaryotes,
a. both significantly remodel chromatin
b. both have transcription and translation in separate cellular compartments
c. both produce differentiated cells
d. both use transcription control
e. both have alternative splicing
D
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Which extraembryonic membrane encloses a fluid-filled sac?
a. yolk sac b. amnion c. chorion d. allantois e. umbilical cord
All of the following types of chemical bonds are responsible for maintaining the tertiary structure of
this polypeptide except:a.
ionic bonds.
b. hydrogen bonds.
c. hydrophobic interactions.
d. disulfide bonds.
e. peptide bonds.
Cotransport systems directly provide energy for active transport of solutes
__________________ Indicate whether the statement is true or false.
Hematocrit is the percentage of red blood cells in the blood. In adult humans, hematocrit is roughly 40-45%, but it can be much higher or lower in other animals. Consider the Weddell seal, a mammal that can dive and hold its breath underwater for upwards
of 80 minutes. What is the hematocrit level of a Weddell seal, and why? A) It is likely lower than that of an adult human because the seal needs access to less oxygen when diving. B) It is likely lower than that of an adult human because the seal needs access to more oxygen when diving. C) It is likely higher than that of an adult human because the seal needs access to less oxygen when diving. D) It is likely higher than that of an adult human because the seal needs access to more oxygen when diving.