Frage 116

Which statement correctly classifies the energy requirement of osmosis?

It always consumes ATP at membrane pumps.
It requires no direct cellular energy input.Richtige Antwort
It occurs only while a cell is respiring rapidly.
It is powered by contraction of the cell membrane.

Erklärung

Osmosis is passive, with net water movement arising from a water-potential difference rather than direct cellular energy use. Energy-powered solute pumping can create gradients, but that does not make the water movement itself ATP-driven.

Erklärung

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