Question

Myoglobin is an example of a protein containing what level of protein structure

CHECK ALL THAT APPLY

_SINGLE STRAND

_SECONDARY

_PRIMARY

_QUARTERNARY

_DOUBLE STRAND

_TERTIARY

Answer 1

Ans is Myoglobin is a tertiary structure which contains single strand, primary and secondary structure.

Reason: Myoglobin is a single strand of amino acid residues bonded by peptide bonds, arranged in a particular sequence known as primary structure. Then this primary structure further twist by phi and psi angles into secondary structure (in this 8 alpha helices) . Secondary structure is strengthened by hydrogen bonding. These alpha helical secondary structure further folds itself into tertiary structure. This tertiary structure is holded by multiple vander waal forces , hydrophobic and ionic interactions between the distantly located amino acid residues.

Quaternary structure is only possible in Mutlisubunit proteins like hemoglobin due to interaction b/w various subunit. But myoglobin is a single subunit protein , hence it doesn't have quaternary structure.