Question

Which substance on the plasma membrane helps identify chemical signals from outside the cell?

Question 19 options:

carbohydrate chain

cholesterol

membrane protein

transport protein

Answer 1

The correct answer is carbohydrate chain.

Step-by-step explanation:

Plasma membrane contain various proteins such as peripheral proteins,transmembrane proteins,GPI anchored proteins.Among them some protein contain carbohydrate chain basically oligosaccharide chain which is arranged in the extracellular portion of the plasma membrane.

The principle function of these oligosaccharide side chains is to detect various chemical and biochemical signals from outside the cell .

For example integrin is a glycoprotein that detect the signal for communicating with the adjacent cells.