What happens during the cotransport of glucose and sodium ions?
a. The transport of glucose powers the transport of sodium.
b. ATP causes a conformational change in the carrier protein.
c. Both D and E
d. Glucose molecules are transported against their concentration gradient.
e. Sodium ions are transported against their concentration gradient.
c
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The decline of the eugenics movement in the U.S. in the early 20th century resulted from ____
a. breakthroughs in genetic technology b. violent protests by the medical community c. the ability to manipulate gene expression d. social outrage at the number of deaths caused by botched sterilizations e. its misuse for social and political purposes by the Nazis
The defining characteristic of a stem cell is
A) self-repair. B) self-renewal. C) the ability to turn into a cancer cell. D) its origin from a progenitor cell.
All of the following pertain to platelets, except
A. they are not whole cells but are pieces of cells. B. they originate from giant multinucleate cells called megakaryocytes. C. they contain hemoglobin to transport oxygen and carbon dioxide. D. they function primarily in hemostasis. E. they function in blood clotting and inflammation.
All three of these species are harmful. This is an example of
A) Müllerian mimicry. B) Batesian mimicry. C) optimal foraging theory. D) functional response.