Food Chemistry & Biochemistry MCQs (Quiz 1) Posted on May 8, 2026May 9, 2026Author agropublishers 0 Food Chemistry & Biochemistry MCQs (Quiz 1) Multiple Choice Questions [Food Science MCQs] _________________________________ 1. Enzymatic browning is catalyzed by ___________________ Polyphenol oxidase Amylase Catalase Lipase 2. Caramelization in foods mainly involves the thermal decomposition of ______________ Sugars Proteins Lipids Minerals 3. Denaturation of proteins refers to the _____________ Formation of new amino acids Hydrolysis of vitamins Alteration of protein structure without breaking peptide bonds Conversion of proteins into lipids 4. Water activity (aw) represents __________________ Free water available for reactions Total water content Amount of bound water Moisture percentage 5. Rancidity in fats and oils is primarily caused by _______________ Starch gelatinization Mineral oxidation Oxidation of lipids Protein coagulation 6. Microbial growth in foods is strongly influenced by __________________ Pigment composition Fiber concentration Ash content Water activity 7. Hydrolysis of starch into simpler sugars is mainly carried out by _______ Amylase Lipase Catalase Protease 8. Hygroscopic substances are materials that ____________ Convert water into ice Absorb moisture from the surrounding environment Prevent evaporation completely Repel water molecules 9. Freeze drying preserves food quality mainly by _________________ Adding chemical preservatives Destroying all nutrients Increasing lipid oxidation Removing water through sublimation 10. The Maillard reaction is a non-enzymatic browning reaction that primarily occurs between ___________________ Proteins and vitamins Lipids and minerals Reducing sugars and amino acids Water and starch Loading … Question 1 of 10 _________________________________ [Explore all MCQs] [Horticulture MCQs] [Introduction to Pomology MCQs] [Introduction to Olericulture MCQs] [Plant Physiology MCQs] [Plant Nutrition MCQs] [Crop and Environment MCQs] [Botany MCQs ] [Soil Science MCQs] [Soil Physical Properties MCQs] [Soil Chemical Properties MCQs] [Agronomy MCQs] [Cell Structure & Cell Organelles MCQs] [Gene Expression MCQs]