24. What is the quaternary
structure of a protein? Do all
proteins have quaternary
structure?

Gap-fill exercise

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The protein structure isthe
spatial conformation due to interactions
among chains that form the
protein.

Only those proteins made of two or
more polypeptide chains have
structure. (two
chains), (four chains) and
the (antibodies, four
chains) are some examples of protein
having quaternary structure.