Transport In Plants Question 1
Question: Movement and accumulation of ions across a membrane against their concentration gradient can be explained by
(1) Osmosis
(2) Facilitated Diffusion
(3) Passive Transport
(4) Active Transport
Show Answer
Answer: (4) Active Transport
Explaination-
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Active transport is the only transport method that can move particles against their concentration gradient (from low to high concentration).
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Facilitated diffusion only moves particles down their concentration gradient from high to low concentration.
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Osmosis is a process by which the molecules of a solvent pass from a solution of low concentration to a solution of high concentration through a semi-permeable membrane.
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Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes
