Which term best describes the process by which sucrose is moved into a cell against its concentration gradient while at the same time, protons are moved into a cell with their concentration gradient?

a. facilitated diffusion
b. a symport
c. an antiport
d. active transport


Answer: b. a symport

Biology & Microbiology

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Which soil type is the most prone to leaching?

a. gravel or sand b. silt c. clay d. humus e. none of these

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Which cells stimulate B cells to divide and produce antibodies?

a. mast cells b. macrophages c. NK cells d. TC cells e. TH cells

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