Question

Which functional group participates in disulphide bond formation of the protein?
A. Thioether
B. Thiol
C. Thioester
D. Thiolactone

Answer 1

Hint: The protein is formed by the long chain of the concerned amino acids which are connected with the strong disulfide bond with each other.

Step by step answer:
The protein is formed by the bonding of different amino acids with the disulphide bond with each other so that they can not break easily and on the low temperature as disulphide is a very strong bond. The sulfur group is attached to the hydrocarbon group that is either alkane or alkene either a single-bonded hydrocarbon chain or double-bonded hydrocarbon chain. These alkanes or the alkene groups are also called thiol groups as sulphur is also attached to these hydrocarbon chains. The thiol functional group participants in the disulphide bond formation of the protein. If the disulphide bond of the protein will break due to any reason then this is known as denaturation of the protein as the disulphide bond helps the information of the long chain of the amino acids, and due to the breakdown of this bond the amino acids will get separated and this is known as denaturation of the protein chain.

So here the option B is correct.

Note: Inside the cell, during the process of protein synthesis the disulphide bond is formed inside the endoplasmic reticulum of the cell. Due to this the protein present in the nuclear does not have any disulphide bond only those who are present in the cytoplasm and go through the endoplasmic reticulum have the disulphide bond.