Articles > Quizzes & Surveys > Protein Variety – Quiz Protein Variety – Quiz Quiz Choose the best answer. 1. The type of protein used for structural purposes. Fibrous proteins Globular proteins Conjugated proteins 2. The globular type of protein that serves as a chemical messenger. Enzyme Hormone Antibody 3. A globular protein involved in immune reactions. Enzyme Hormone Antibody 4. Heme in hemoglobin is an example Enzyme Conjugated protein Structural protein 5. Also referred to as biological catalysts Enzymes Hormones Globular proteins Send Your Results (Optional) Your Name To Email Time is Up!