Question

You are monitoring the diffusion of a coloured molecules across a membrane. Which of the following result in the fastest rate of diffusion?

• A. An internal concentration of 5% and an external concentration of 60%
• B. An internal concentration of 35% and an external concentration of 40%
• C. An internal concentration of 60% and an external concentration of 5%
• D. A and C are correct

Answer 1

The correct option is D A and C are correct

Diffusion is the net passive movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. It continues until the concentration of substances is uniform throughout. Diffusion rate becomes fastest when there is a difference of 50-55% between the internal and external concentration across a membrane.

So, the correct option is 'A and C are correct'.