How many statements about diffusion is/are false? (i) The diffusion rate depends on the size of the substrate. (ii) Diffusion across the membrane depends upon its solubility in lipids. (iii) Membrane protein provides sites for a hydrophilic substance to cross the membrane. (iv) Facilitated diffusion is carried out by proteins.

Question

How many statements about diffusion is/are false? (i) The diffusion rate depends on the size of the substrate. (ii) Diffusion across the membrane depends upon its solubility in lipids. (iii) Membrane protein provides sites for a hydrophilic substance to cross the membrane. (iv) Facilitated diffusion is carried out by proteins. (A) 0 (B) 1 (C) 2 (D) 3

Tardigrade Admin · Accepted Answer

Diffusion is a slow process, depends on the size of substances, smaller the size faster if the diffusion. The diffusion of any substance across a membrane depends on its solubility in the lipids, substances that are soluble diffuse faster through the membrane. Some substances find it difficult to pass through the membrane and to facilitate the movement of such molecules, the membrane protein provides sites at which these molecules cross the membrane. This is known as facilitated diffusion.