Which substance on the plasma membrane identify chemical signals from outside the cell?
question 32 options:

carbohydrate chain

cholesterol

membrane protein

transport protein

The correct option is A) carbohydrate chain

Explanation:

The carbohydrate chain present in the cell membrane helps determine the characteristics of the cell and it also helps to identify the chemical signals from outside the cell. Hence, option A is correct.

Other options, like option B, is not correct because the function of the cholesterol in the cell membrane is to prevent the fatty acids from sticking together. Option D is not correct because transport proteins help some molecules to move inside the cell.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher