Which of the following statements is true?

a) During active transport, a material may be moved from an area of low concentration to an area of high concentration.

b) During passive transport, energy is used to move material against a concentration gradient.

c) During active transport, water is pumped across a membrane to equalize the concentration of salts on both sides.

d) During passive transport, osmosis allows salts to move from one side of the membrane to the other to equalize concentrations on both sides.

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Lucia Anthony

27 July, 00:03

Which of the following statements is true?

a) During active transport, a material may be moved from an area of low concentration to an area of high concentration.

b) During passive transport, energy is used to move material against a concentration gradient.

c) During active transport, water is pumped across a membrane to equalize the concentration of salts on both sides.

d) During passive transport, osmosis allows salts to move from one side of the membrane to the other to equalize concentrations on both sides.

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Shania Branch · Answer 1

D, A (possibly C)

all of these are correct. Although C is stated somewhat strangely because it says water is pumped across a membrane, it would be better stated as particular ions are pumped across a membrane as this is more correct. I'm not even sure if it would be counted as correct to say water after all.

For reasons of precautions, I would say D and A are correct.