Proteins are found to have two different types of secondary structures viz $α -$ helix and $β -$ pleated sheet structure. $α -$ helix structure of protein is stabilised by
(a) peptide bonds (b) van der Waals, forces
(c) hydrogen bonds (d) dipole-dipole interactions

Q. Write one difference between

α

-helix and

β

-pleated structures of proteins.

Explain the terms primary and secondary structure of proteins. What is the difference between $α -$ helix and $β -$ pleated sheet structure of proteins?

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Most common types of secondary structures of proteins are?

The correct option is B α− helix and β− pleated structuresThe most common types of secondary structures are the α helix and the β pleated sheet. Both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another.

The correct option is B $α -$ helix and $β -$ pleated structures
The most common types of secondary structures are the $α$ helix and the $β$ pleated sheet. Both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another.