Question

You are monitoring the diffusion of a coloured molecule across a membrane.Which of the following will 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

Heya dost... ❤

Ur answer is

(a)An internal concentration of 5%and an external concentration of 60%

Answer 2

The correct answer is: (d)

Explanation:

• The diffusion of the coloured molecules across a membrane down the concentration gradient is known as Osmosis.
• Molecules tend to move from a region where its concentration is high to a region where its concentration is low.
• The difference in the concentration of a substance in two different regions is known as the concentration gradient.
• The rate of movement of molecules down this gradient is highest when the gradient is more.
• In option (a), the difference in concentration of the coloured molecules  across the membrane is, 60%-5% = 55%, but since the concentration of the molecules is more in the external environment as compared to the internal environment, so the molecules would from outside to inside across the membrane.
• In option (c), the difference in concentration of the coloured molecules  across the membrane is, 60%-5% = 55%, but since the concentration of the molecules is more in the internal environment as compared to the external environment, so the molecules would from inside to outside across the membrane.
• So, the correct answer is both (a) and (c), that is, (d).