Amino Acids, Proteins and Porphyrins
Which of the following is true about primary structure of proteins:
|A||Linear sequence of amino acids held by peptide bonds determines the primary structure|
|B||Primary structure is helical|
|C||Primary structure is stabilized by hydrogen and disulphide bonds|
|D||None of the above|
a. Primary structure of a protein is the order of amino acids joined by peptide bonds in the polypeptides forming the proteins, and it includes the disulphide bonds also.
b. The forces that stabilize the protein structure are:
i. Hydrogen bonds,
ii. Electrostatic interactions,
iii. Hydrophobic interactions and
iv. van der Waal forces. However, these forces are not part of primary structure of the protein.