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Q. Assertion: All enzymes are made up of proteins and all proteins have three dimensional structures.
Reason: Secondary structures of protein are sequence of amino acids.

AIIMSAIIMS 2013Biomolecules

Solution:

All enzymes are made up of proteins and all proteins do not have 3-dimensional structures as proteins are classified into primary, secondary, tertiary and quaternary structures and only tertiary has 3-dimensional structure. The sequence in which the amino acids are arranged in a protein is called primary structure of protein.