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.

Step-by-step solution

(d) : 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.