Most of the cellular secretions are ________ in nature?

Explanation

Many cellular secretions are glycoproteins, in which carbohydrate groups are attached to protein molecules; examples include several hormones, enzymes, antibodies and mucus components. Nucleohistones are nuclear DNA-protein complexes and are not typical secretions. Students may choose proteins because many secretions are protein-based, but the question is emphasizing the carbohydrate-protein conjugate.