Question

(d) predict the likely effect on the ability of substance l to enter the cells if substance l is attached to a large protein instead of free in the culture.

Explanation:

Cell membranes have size - based permeability barriers. Large molecules have more difficulty passing through. Attaching substance L to a large protein would increase its effective size.

Answer:

The ability of substance L to enter the cells would likely decrease because the large - protein complex is too big to easily cross the cell membrane.