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Question
Yeast cells take up glucose (a sugar) to use as their primary source of energy. Typically, glucose concentrations outside yeast cells are far lower than glucose concentrations inside the cells. Therefore, for yeast to take up glucose, the cells must use:
A) facilitated diffusion to move glucose down its concentration gradient.
B) active transport to move glucose up its concentration gradient.
C) facilitated diffusion to move glucose up its concentration gradient.
D) active transport to move glucose down its concentration gradient.
E) osmosis to directly absorb glucose.
Answer
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