A cell is placed in a solution containing a substance not initially present in t

Question

A cell is placed in a solution containing a substance not initially present in the cell. After twenty minutes, the concentration of the substance inside the cell is five times the concentration found outside the cell. The most likely explanation for this is that the substance

            A) diffused into the cell.

            B) was something that the cell needed to survive.

            C) was actively transported.

            D) was hydrophobic.

            E) All of the above would be correct.

Please explain too, thank you!

Explanation / Answer

The diffusion can take place in any medium and the rate of diffusion is affected by the molecular weight of a substance. High molecular mass means that the particles will be heavy. Rate of diffusion is slower in case of heavy particles as these particles move slowly. The direction of diffusion depends on concentration gradient. In diffusion there is a net flow of molecules from region of higher concentration to region of lower concentration.

Correct option is   A) diffused into the cell.

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