Question

What is the source of receptor proteins?
A) Interior of a cell
B) Cell wall
C) Out of cell wall
D) Fixed in the cell membrane partially inside and partially outward

Answer 1

The answer to this question is based on the concept of protein structure and the receptor cells where the receptor proteins are fixed to the cell wall and signal is transferred from outside to inside the cell. This fact gives the correct answer.

Complete answer:
In the lower classes of chemistry, we have studied human biology where there are many concepts which also include the cell wall and the terms relating to it. Now, let us consider some of the facts about protein receptors and their functions which will lead us to the correct answer. We know that proteins are naturally synthesised in our body and also it is maintained by the dietary intake. Receptors are those protein molecules which are very helpful for the transmission of signals from inside to outside or from outside to inside the cell.
- The chemical signals are usually released by these signalling cells in the form of small molecules called ligands which are usually volatile or soluble molecules.
-Protein receptors are present in such a way that they can transmit the signals from the outside and inside cells
- They are the chemical messengers that are present in such a way that they can interact with the outside portion of receptor protein which functions to transfer signals to the interior of the cell. Thus, they are fixed in the cell membrane partially inside and partially outward.

Therefore, the correct answer is option D).

Note: Note that the protein receptors are the molecules responsible to initiate physiological response and also they are generally the transmembrane proteins. Thus, questions based on this fact can also be asked.