Answer :

Primary structure of proteins refer to the sequence in which the amino acids are arranged in them. Proteins have specific sequence of amino acids which are essential for a particular biological activity. The change in even one amino acid can alter the biological activity.



Secondary structures of protein refer to the arrangement of the polypeptide chain giving rise to a particular shape, which arises due to hydrogen bonding.


The two common secondary structures of proteins are α-helix and β-pleated sheet structure.


An α helix is a right-handed helix that is held together by hydrogen bonding. In this structure the hydrogen bond is formed between the N-H on one amino acid and the C=O on another amino acid 4 residues away.


The β sheet is formed when beta strands are linked together by hydrogen bonds, forming a pleated sheet of amino acid residues. Again, the hydrogen bonds are between the N-H group of one amino acid and the C=O group of another.



Structures of α-helix and β-pleated sheet.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Explain the termsChemistry - Exemplar

Write the structuChemistry - Exemplar

Protein found in Chemistry - Exemplar